Re: oil coming out of breather gumming carb. Whilst on the track during a recent practise day (dirt speedway), a large amount of smoke came out of the crankcase breather filter so I quickly returned to the pits and found that oil had been spat out all over the place. Okay well cleaning that tube may help, but some smoke/vapors are supposed to come out of it. Just so that oil that jumps around in the valve cover does not come out. It uses a fair amount of oil but not ridicules amounts. I replaced it already and there is no difference. I need some help with this. I am going to make a serge type tank so the oil can't escape and can drain back into the engine and vented of course. Is this a breather for the water pump or something? I cannt see why there would be coolant in the crankcase to come out of the. One breather, and a cap. The majority of my leak is indefinitely coming from ccv breather tube. and wreak havoc inside your engine. Re: 1994 Mitsubishi - 4M40 Engine Breather Blows Oil 12/11/2010 11:45 AM I also had the same problem with a 4m40 engine, thus i took off the rocker cover and flushed the breather with caustic soda and hot water, a lot of messy sludge came out of there. The breather is often located in the oil cap. If there is that much oil coming from the air cleaner then I would recommend taking apart the breather to clean the oil out. Of course, a direct contributor to oil windage is excess/over-filled oil levels. Oil coming out of the breather is natural and normal, with basically no way to stop it. If oil is coming out of it while it is running a seal in the head wore out and water is getting into the crankcase and displacing the oil. You absolutely should NOT be LOSING OIL through the breather. 9 cdti oil catch, 1. The oil may even appear milky over time and your oil sample will reflect high moisture content. It appears to be engine oil and upon inspection it seems the only place it could be coming from is the crackcase breather. I've seen it happen with exhaust gas and worn piston rings where exhaust gasses actually shoot into the crankcase and come out the port. S&S Crankcase Breather Valve For Harley Twin Cam A Motor Solves the pesky problem of oil carryover in Twin Cam "A" motors with the stock oil pump. I have friend that got a Delkron Time-N-Space Tool and I got a brand new S&S Breather Gear Kit. The sealing ability of the piston rings can be checked by using a leak-down tester. Make sure there are no kinks or bends in the hose as it travels upward. * If it is difficult to separate the crankcase halves. To prevent a vacuum being created, the blow-by gases are replaced by fresh air using a device called a breather. On that engine if you follow that tube it go's to the valve cover. The video you are showing has nothing to do with the carburetor. It is normal for a little bit of oil to come out of the breather but not an excessive amount. If the air filter is full of oil, it should be replaced. Of course it did not blow oil while they had it. so I have routed the breather out a hose and ran it out the back along the frame. sled was in accident before we bought it , replaced right side suspension , oil tank (was crushed) , changed the filter put 3 l oil in , started sled then oil started coming out bottom of breather , shut it off , pulled the breather apart & was full of oil , checked the oil & toped it off , ran the engine again with the breather cover off & the oil is coming out the vent hose & not just. I tore my engine apart to replace gaskets because it was leaking oil. I'll change my oil to factory spec, then making sure it's all the way to the top line on the dipstick. The oil tank breather is very important since it lets the engine, through the oil tank, breath to the atmosphere. The oil line routings are good. There is little to no visible smoke out of the crankcase breather at 2400 RPM. I let a friend borrow it and he somehow lost the breather to it and now it blows oil out of the hole when running. Finally got it running. The net result is oil in your air box. I have 2 x AD31 in my Sealine 285. I have a dual plane intake and a holley 750. Honda designed the breather system to feed air INTO the valve cover - not to allow gasses to escape through the valve cover. com - The Friendliest Tractor Forum and Best Place for Tractor Information. Oil out the Valve cover breather 04-13-2007, 01:10 AM Well I did an engine flush and changed my oil a few times after and then I took the first long trip I've taken since I purchased the jeep. help!! oil blowing out of dipstick If this is your first visit, be sure to check out the FAQ by clicking the link above. Make sure that you are not overfilling the crankcase with oil. Hey Terry did you find out why where you leaking oil out the fly wheel my 2010 pro star with a isx is doin the same thing but I put a breather in the inspection hole about 2 months before I noticed blue smoke coming out the exhaust pipe I'm goin to remove the breather I put on it I haven't done it yet but do you have any suggestions. I ran my breather filter over the engine and down low and hasn't been an issue. Some days it doesn't do it. I recently deleted my PCV system due to what I believed and what others on this forum believed to be excessivre oil in my intake. The only other thing that I can come up with is that there might be something plugged or wrong with the baffles in the valve cover that separate the oil from the air coming out of the breather tube. "Speedy Jim" suggested the following test - Clean everything up real well to spot the source. With the motor warm pull the breather and see if it's puffing smoke. Help Support Mini Dirt Bikes: Mar 28, 2010 #1. In other motors, the oil gets rather hot and any water vapor that may condense will steam-off and exit the crankcase breather. This is maintained by the crankcase breather valve. If the cap gets blown off, there is too much pressure in the crankcase. less that 1,000km ago. Excessive oil through crankcase breather Long story short I had the engine rebuilt for my 914-6 track car two winters ago and have participated in 2. If it wasn’t ‘fogging’ smoke out the exhaust, then like you say, the engine is not the culprit. While running the buggy hard you could always smell oil vapor but never had oil come out of the filter. The fitting is flush with the crankcase wall inside the crankcase. Triumph Deluxe Belt Drive Crankcase Breather Kit. Only has 100,986 miles on it. On a mate LC coupe, he had a sealed (non breather) oil cap on it and even with the PCV it generated enough preasure to push half the contents of his sump down the valves and burn it in a trip to hanging rock a few years ago. oil catch cans are nothing more than charcoal canisters that draw evaporated oil out from the air passing through the cans. I also rechecked the oil level in the light (usually it's dark when I check it). Almost all road going cars since the 1960’s, right from the Ford Escort to the McLaren F1, will have a closed breather system that deposits crankcase gases and carried over oil back into the air intake. Pull your dipstick and smell it, if it smells like diesel, then you have the above problem and possible causes. It also seems to be coming out of the valve cover. The problem I have is oil comming out of the breather and hitting my windshield a few drops. no oil, no smoke, just steam. just bought a 90 model softail, been sitting for a few months and the guy I got it from said it was blowing smoke from the crankcase breather hose on idle but ok while riding, got it home put a battery in and cranked it over, nearly fired but noticed a great pool of oil on the ground coming from the crankcase breather hose, was pumping it out from the moment I hit the starter, ol mate told me. There are a couple of things that will cause this. Re: White Smoke and Oil Emissions From Crank Case Breather on Diesel Engine 02/24/2015 2:35 PM If droplets of oil gets blown out at the breather, the crank case has too much oil in it or compression is leaking past the pistons. After some investigation it looks like the oil is escaping from the crankcase breather filter and it's not just a weep. kohler CH20 oil coming out of breather I have a project max IV with a kohler CH20 and I just got the new head gaskets put on. The breather valve opens to relieve high crankcase pressure during the piston down stroke as well as returning the air/oil mist from the crankcase into the low pressure area of the cam chest. During the first few minutes of running the oil was being returned to the oil tank in a steady robust stream. Posted: Sun May 24, 2015 1:06 pm Post subject: Farmall H has oil coming out of breather tube After I drive my H for a few minutes and park it, oil drips out of the breather tube. I crawled under it while it was running and oil was coming out of the crankcase breather and smoke. Oh, he means the breather! Yes, I am well aware of the breather, that is where the oil is coming from!! Anyway, this weekend I had a chance to pull the breather off. If oil is coming out liberally, there may be a worn valve retainer. Oil leaking out the overflow tube The overflow tube probably is what I'd call the crankcase breather pipe. When the engine is running and I take off the pipe from the breather to turbo inlet I can feel weak pules coming from the crankcase breather but they aren't as powerful as the pulses at the oil filler cap. example if the air is coming out the exhaust pipe - this might be valves not closing or a cylinder - cylinder HG fault. Just had the same thing happen to mine. I've read an article which was posted in another thread regarding the importance of the CCV system but it does not clearly tell me where to hook it up on a carbureted engine. When you take the oil filler cap off there is a lot of air blowing out, the breather pipe is clear and it has not lost performance and it's not burning oil. I have a lot of oil coming out of my crankcase breather, 1992 harley, ultra classic tour glide. I have attached a photo of the breather tube (90 degree elbow). That crankcase pressure forces engine oil past the failing crankcase seal and into the tranny. If you have enough of it to be running out of a soaked up intake the crankcase must have had way too much oil in it. UPPER CRANKCASE • Remove the breather cover 1. This might be for a dry-sumped engine, though I can't se why it would not apply to a wet sumped engine. Do NOT drill a hole in the crankcase!. On most four-stroke lawn mowers, a small oil pump delivers oil from the reservoir to the crankcase and piston. I have a 2005 Carter Talon GX150IIR. This will cause an oil pressure drop then things go to Hell quick. It's emulsified oil, as the oil mixes with water which condenses out of the crankcase breather gasses. Just so that oil that jumps around in the valve cover does not come out. The engine has less than a 100 miles so I know the rings are not seated yet and I'm running without a hood so the breather is in the air flow. The PPE 114025000 Crankcase Breather Filter Kit for your 04. If it is like most Tecumseh engines, the breather tube is coming out of the valve cover. There will be quite a bit of oil coming out the breathers, and all sorts of stuff going back in. Crankcase Vent (CCV) - The crankcase vent is an oil separator that ensures oil mist generated in the normal functioning of the engine finds its way from the top of the engine back to the oil sump. I've seen it happen with exhaust gas and worn piston rings where exhaust gasses actually shoot into the crankcase and come out the port. A small engine breather valve is a one way check valve. The oil level is correct and will leak until no oil is left. there is a reed valve in the breather assy , when it breaks the crankcase no longer forms/holds a vacuum and it pumps the oil mist out as the pistons pump the air in the crankcase when they move back and forth ( take the oil cap of while its runing and it will cover you with oil ) and also blows the gas mixure out of the carb as its connected to it ( its supposed to suck the vapors in and burn. P · 9 years ago. I rode the bike another 1,000 miles or so and now it pushes some oil out the breather vent, I mean a light mist constantly while riding. once back in, after a couple hours i discovered it is blowing oil into the air cleaner through the breather tube marked in the photo and item #16 in the part pic. The recommended (Roger King) routing for breather pipes for X-flow was, I believe, from crankcase breather to rocker cover somewhere between the two carbs, and then outlet pipe to catch tank coming from rear of rocker cover. SOURCE: 89 Harley FLTCU oil coming from the crankcase breather tube and This is an age old problem for the Harley engine. it only leaks for about 3 mins then stops, the bike was serviced 2000 miles ago and runs very well please help. Re: oil comming out of crank case breather Originally Posted by gfp55 80 psi seems kinda high, if the oil pressure is too high and the reed valve is only good to 60-65 psi then you will get oil coming out the breather. Well I just started working on the bike to replace the Reed Valves and I came across the Crankcase breather hose. The fitting is flush with the crankcase wall inside the crankcase. That crankcase pressure forces engine oil past the failing crankcase seal and into the tranny. I pulled the recoil and the housing behind it thinking I would find where the breather came from. Unlike a two-stroke (crankcase-compression) engine, the crankcase in a four-stroke engine is not used for the fuel/air mixture. RMZ oil spewing out of breather hose when throttle got stuck on. its not really bad, alot of high compression engines will have blow-by all the time, some guys will run a breather that they can attach a hose to and run the hose under the car, you will see that on some of the track cars. Many common lawnmower issues can be traced back to a dirty, clogged or worn out crankcase breather or PVC valve. The water gets mixed with the gas, which causes the buildup and can increase fuel consumption in your. Is this a breather for the water pump or something? I cannt see why there would be coolant in the crankcase to come out of the. 9 cdti crankcase breather, whats it mean if oil in inlet manifold pipe on vectra c diesel 150,. Should I have the tube cleaned? Is there a ccvf I should change? The breathee tube looks to be pretty gumped up but doesn't like oil and it doesn't seem to have any excessive oil comsumption. 9) Oil pan gasket. The compressor builds up pressure in the head until the connecting rod breaks usually coming out the side of the compressor crankcase. I'm thinking there should be a T fitting, elbow or whatever in the line near the engine to which a breather hose runs to the oil tank - which is the frame. My neighbor's bike has new rings, but again, I just honed it, so probably needs to be bored out. but none of the oil present is fresh oil nor is the oil pan coated. Unfortunately, it's not just condensed oil. The breather window closes when the pistons are on the up stroke to create a low pressure area in the lower end. Just been down to boat and cleaned up the bilge for the fortieth time and the only place any oil is coming from is the breather which is on top of the air filter it seems to be going in to the sponge of the air filter and dripping down underneath So it doesnt look like crank case oil seal I hope, the place the leak appears is under the air filter I had a look around the seals and there doesnt. I'm not sure on your particular motor. P · 9 years ago. I had her running after I replaced the head, and right away there was alot of smoke coming out of the crankcase breather, to the point where it was even coming out the oil filler if you took the cap off. Some bikes havea timed gear driven crankcase vent in them (HD) If it has a vent like that make sure it's timed right Other than those two issues the only other reason to pump oil out vent is excessive crankcase pressure Just gotta see where its coming from P. there is so help, crankcase breather hose blowing oil - Yamaha Rhino Forum - Rhino Forums. they are on top of the engine "black box" there is 2 filters a square one and a smaller round one, to see if that sorts it out dont try to think you will just take the filters out and try it !!!! for some reason they dont like it with out filters in there?? can fill with oil and cause major problems,,, there is a way to do away with these filters and. It runs good but I watch the oil. The problem I have is oil comming out of the breather and hitting my windshield a few drops. In addition to filtering the. It works by allowing high pressure to escape the engine crankcase, but close when crankcase pressure is lower than the outside ambient air. I have the MMP relocation inlets on Pure stage 2s. After I leaned it out there was still alot of fuel coming out at high throttle positions. Virago 250 oil pumping out of crankcase breather. 1959 Model 50 - with the bike having wet sumped during a period of non use due to work being done on alternartor, when the bike was started oil was blown in copious amounts out of the crank case breather. I have a 1986 Heritage with an S & S lower end. I have a Trask on my bike and it is dry as a bone. I would suggest a (stainless if there is) steel wool pad in the breather hose. Craftsman blowing oil out breather tube [ 4 Answers ] Craftsman 6. IF it is then compression is getting into your crankcase halfs either around the piston OR your head gasket is blown between the cylinder and where the cam chain runs. It does it even if i rev the car in nuetral a little i can see the oil squirt out the breather on the valve cover. You need to get more breather on that engine. the motor was properly broken in, oil changes were done correctly. UPR Crankcase Breather Oil Cap. Took it to a local Kubota dealer and they found nothing wrong. i have noticed that my crankcase breather filter always has a drop of oil on the bottom of it and seems to be leaking oil onto the block. ,i ccheck. There is about 1/2 qt of oil in the bottom end of an engine, as the pistons travel downwards, the air that is under them is being pressurized and is vented out of the engine by a rotary breather valve in the case. The way it is in there, it sits really low and no wonder oil is coming out. Blowby comes from air being pushed into the crankcase. Breather Tube Function. The bike had 1,553 miles on it when I bought it and after riding it for roughly 1,500 more miles I decided that I would change the 20-50 Harley oil that was in it, to Amsoil 20-50 synthetic. On occasion the filter seal be cracked, or if too heavy handed the filter housing can crack. Unless you have mistakenly filled the crankcase with gasoline there is no way it should be comeing out the breather hose into the filter assembly. black art of breather system function and design, and why engines need them. Plumbed into a vehicle's PCV system to capture the excess crankcase vapors, residual oil mist and moisture from reentering the intake tract Vehicles from the factory vent these excess crankcase vapors, residual oil mist and moisture right back into the intake manifold which could cause detonation, oil deposits to form in the intake tract including the valves themselves and from lowering the. Excessive oil through crankcase breather Long story short I had the engine rebuilt for my 914-6 track car two winters ago and have participated in 2. by the way if its burning oil the smoke would be blueish colored, not black. All because I checked my oil with my quad being completely cold and not ran for a lil while. If you do get regular oil coming out, that usually indicates a problem like too much crankcase pressure or too high of an oil level in the motor. there are numerous things that can cause oil to blow out. Normally when I pull the black plug a small amount of dirty oil will come out. then shut it off and check it without screwing in the dip stick. In the first 10 minutes of the Kodiak sitting and running it looked like the Kodiak dripped about 1/8 of an ounce underneath the bile. theres alot of smoke coming out of my breather hose could this be too much oil i put a quart and a 1/8. I asked one of the mechanics to check the engine and he says there is too much oil coming out from the breather of the engine as vapour and if left unchecked, may damage the turbo charger after sometime. I do not know the full load crankcase pressure, but they do drip about 2 oz of oil out of the crankcase breather every 100 hrs if run at 2400 rpm. this build has less than 3 hrs Oil coming out crank breather - Honda TRX Forums: Honda TRX 450R Forum. What you need to do, just collect that oil coming from breather into some storage pan and ride the bike untill leaking will stop itself. It wasn't just a couple of ounces as in a sumping issue but half the tank was drained out. Get free shipping, 4% cashback and 10% off select brands with a Gold Club membership when you get a Kuryakyn Bluegrass Crankcase Breather Catch Can (part number 9931) from J&P Cycles. This seal is directly above this screw. A small engine breather valve is a one way check valve. I would suspect that your sparkplug is loose or the sealing washer is defective if you have "oil running out". That moisture will also seek the highest point like piston rings, etc. If the oil over filled, pour some out and recheck the level. If you do find oil in your air cleaner it may well be that your PCV valve is stuck closed and is therefore not sucking the blow-by out of the crankcase but rather, it is blowing back into the air cleaner. Put a crankcase breather filter on it, and secure the hose and filter to restrict movement. This must make even the brand new breather assembly not work (after all, the breather assembly is nothing more than an oil separator, allowing crankcase vapor to pass through it but straining out oil droplets). My machine runs great but I will have periods where the engine spits oil out the breather tube coming off valve cover. Feuling makes an oil tank breather kit that releases power-robbing pressures from the oil tank and crankcase, reduces blow-by, helps prevent dipstick blowout and promotes proper oil flow to and from the remote oil tank. Happened to me on an old CB750 and made the exit ramp VERY exciting, since I had no idea it was happening, and it came with an open vent. Some bikes havea timed gear driven crankcase vent in them (HD) If it has a vent like that make sure it's timed right Other than those two issues the only other reason to pump oil out vent is excessive crankcase pressure Just gotta see where its coming from P. Here's the update to the oil coming out the crankcase tube. The other side (right side) is the intake and draws air INTO the crank case after the air filter. oil drain tube, I've since come to find, I can leave this valve open, and the oil still drains to the crankcase, rather than air or oil being pulled up through this small diameter drain line. I bought a K&N replacement filter for the original filter house. It's a white-ish colour and puffs out fairly consistent. As the motor turns the oil is pumped out the case breather not sent back to the tank. Typically sump compression caused by worn or broken rings, worn liners or damaged pistons as a result of general wear or excessive overheating will display the following symptoms. Troubleshooting A Crankcase Breather That Is Blowing Oil If your crankcase breather is passing oil, chances are that something's wrong (Okay, we know something's wrong, but don't be too alarmed). If you can, disconnect the breather hose and push it into a tall bottle with a narrow throat, such as a coke PET bo. There is no evidence of oil in the water. The system works much like the positive-crankcase-ventilation or PCV system on your car. It never did this before and I just recently changed the oil. The breather line should rise, if possible, after exiting the engine. Too much oil in the crankcase (overfilled!) Engine speed is too high. I assume that it was caused by the pcv being clogged. Make sure the oil you are seeing is comeing from the crankcase breather. Oil mist is what you should have coming out the breather, not straight oil in a liquid form. Since my compression isn't that bad is the one that 135 the reason I have so much oil coming out???. we're doing some trouble shooting on a car that is smoking from the crankcase vent and also the oil cap while the car is running/idle. Im kinda new to the blaster it a 96 I recently eliminated the oil inj system the thing runs like a raped ape but i noticed after kind of a longer ride that oil was coming out the crankcase vent tube. UPPER CRANKCASE • Remove the breather cover 1. Without some baffling, oil will be blown out the breathers. Of course, if your air compressor is factory lubed for life (also known as oil less or oil free) you will not have an oil sump, and have no need of an oil fill tube. Some days it doesn't do it. A filter called a breather element may become contaminated with hydrocarbons and oil once the PCV valve starts failing. The pressure must be created by some amount of compression that sneaks past the piston rings and into the crankcase. com - The Friendliest Tractor Forum and Best Place for Tractor Information. The oil line routings are good. The idea is for the PCV system to create a slight vacuum inside the engine which causes fresh air to be pulled into via the breather. It works by allowing high pressure to escape the engine crankcase, but close when crankcase pressure is lower than the outside ambient air. Almost all road going cars since the 1960’s, right from the Ford Escort to the McLaren F1, will have a closed breather system that deposits crankcase gases and carried over oil back into the air intake. I relaped valves and replaced all the gaskets I could and put it back together. Now i changed the fuel filter today and there was not only crud in the bottom of the bowl but also appeared to have a slightly blackish look to it versus the. If I remember correctly it just has a simple baffle at the bottom to keep oil from splashing up. OIL PRESSURE REGULATOR • Remove the oil pressure regulator 1. So now with my '72 'B' engine in my '77 MGB, I had a breather filter on the valve cover and at the side cover pipe. Some oil will always come out of the breather. Here are some common causes of blow-by and excessive oil consumption and how you can avoid them on your next engine build. It acts like a PCV valve does on a car engine. The CCV Mod keeps this oil out of the intake plumbing and allows you to drain the collected oil off at a later date. once back in, after a couple hours i discovered it is blowing oil into the air cleaner through the breather tube marked in the photo and item #16 in the part pic. If that mist is coming out, that means your PCV is not working. I assume that it was caused by the pcv being clogged. 4-stroke outboard motor oil doesn’t get nearly as hot, so the water just keeps on collecting. My understanding is if oil is coming out of it then it is because of blow back…. Whatever comes out of the rocker breather tube will also be flowing around in the crankcase. it could have a bad set of rings. 5 race weekends since then. it seems like im getting blow by somehow. This pipe loops up higher than the height of the cylinder head and then trails back down to about the level of the oil filter. From your photos your original breather system would indeed have had its exit pipe coming off the top of the oil tank rather than the left-hand side of the crankcase which was the traditional position. That is evidence of too much crankcase pressure. It replaces the stock valve, and has steel reed valves, which vent the crankcase pressure to the cam chest, on pistons downstroke, and creates a slight vacuum in the crankcase, from the pistons' upstroke, to completely eliminate the pressures that force oil out the head breathers, base gaskets,air cleaner, etc. Excess oil in the engine can cause the oil to foam and be blown out through the breather which generally feeds into the air filter. Aerosol (sub-micron oil drops that create the oily “smoke” seen at the crankcase vent) During engine operation, the concentrations of oil droplets between 3 and 20 μm tends to be low. Since the channels are not sealed against the valve cover properly, the oil bypasses them and exits out the breather vent into the PCV system. The system is not "doing its job" if it is blowing roughly half the crankcase oil out the breather every 1,000 miles. Flood I will hazard a guess because what you describe makes no sence at all. Several advantages to doing this; piston ring seal (less blowby), oil leaks caused by a pressurized crankcase are eliminated, the massive oil spray coming off the crank is not kept suspended by positive crankcase pressure, with a vacuum in the crankcase, the oil falls easier to the bottom of the sump. That way the oil mist from the breather gets sucked back into the engine. Spin the engine a few times to distribute the oil around the cylinder and then run a second compression test, identical to the first. Problem:- Oil is blowing out of the oil tank breather hose in large quantities (confirmed that this is the source of the leak). I've read an article which was posted in another thread regarding the importance of the CCV system but it does not clearly tell me where to hook it up on a carbureted engine. this had a stock rebuild about 5000 miles ago. The crankcase breather, located inside the engine, is a pipe which releases gasses trapped in the engine compartment. I have 2 x AD31 in my Sealine 285. An oil pump with aluminum components is going to have accelerated wear. The recommended (Roger King) routing for breather pipes for X-flow was, I believe, from crankcase breather to rocker cover somewhere between the two carbs, and then outlet pipe to catch tank coming from rear of rocker cover. I have an Air Wolf Air/Oil separator so I cant use the breather tube on the bottom of the engine since it is disconnected. Remove the PCV and shake it. Excessive oil through crankcase breather Long story short I had the engine rebuilt for my 914-6 track car two winters ago and have participated in 2. Another problem is low engine oil or low oil pressure. black means its rich. it doesn't always burn oil when the rings are bad. It's part of your crankcase ventilation. This company also appears to have installed a dodgy breather. If you do find oil in your air cleaner it may well be that your PCV valve is stuck closed and is therefore not sucking the blow-by out of the crankcase but rather, it is blowing back into the air cleaner. but none of the oil present is fresh oil nor is the oil pan coated. Steam or smoke coming out of breather help! Hey guys, first let me say that I did a search before I posted this and I need more input than what I found. Mack’s system returns some of the actual gases back to the air intake for combustion, and simultaneously condenses liquids out of the remainder, returning oil to the crankcase. The crankcase oil should be changed once a year or every 25 hours of run time. This is due to the increased pressure building up in the crankcase, which pushes water vapor through the breather element. It also seems to be coming out of the valve cover. This aroused my curiosity to ask the rest of you this quesiton:. In those that do, the breather tube directs exhaust gases out of the combustion chamber and into a positive crankcase. First try changing the crank case filters,. FWIW my V-6 uses the stock (YES STOCK) breather arrangement with the port to the intake manifold plugged off and a 90cm long hose to atmosphere. This will cause an oil pressure drop then things go to Hell quick. Then large amounts of oil (about a half a quart in around 20 seconds) started shooting out of the crankcase breather tube. Oil coming out of the crank case breather hose??? Discussion in 'Ask the Tech Masters???' started by zc2000, Mar 28, 2010. If you use a clean bottle, you can put the oil back into the tank. When the engine is running and I take off the pipe from the breather to turbo inlet I can feel weak pules coming from the crankcase breather but they aren't as powerful as the pulses at the oil filler cap. No, there is nothing coming out from the tank. Then my mother asks me about the several black spots in the gravel driveway today so Im begining to wonder if something is wrong with my truck. But, excessive oil coming out of the breather is quit often caused by a defective breather system and not a defective engine. Since the oil normally runs above 212 deg F, those combustion by-products tend to remain in vapor form and can be drawn out of the crankcase by negative pressure through the breather system. Just to be on the safer side, I wrap kitchen paper around the breather tube of my Yong Heng to provide additional filtering. There is about 1/2 qt of oil in the bottom end of an engine, as the pistons travel downwards, the air that is under them is being pressurized and is vented out of the engine by a rotary breather valve in the case. If an engine's breathing system should become blocked or restricted, the crankcase will pressurise causing any one or more of the following problems: The oil/air mix will force its way out through any other convenient exit e. Once you switch to an open filter, you are left with a hose coming from the vavle cover's vent that has nowhere to go. In addition, piston engines operated in very cold conditions aloft sometimes have the oil breather line iced. I attached some photos. Whatever comes out of the rocker breather tube will also be flowing around in the crankcase. I was able to use the blower over the weekend, but there was no EOD hill to run the blower up, which I suspected was causing some oil blow off. This might be for a dry-sumped engine, though I can't se why it would not apply to a wet sumped engine. The SpeedForm Chrome Oil Fill Breather would not allow for a functioning PCV system, as the PCV relies on positive crankcase pressure, which you will use when using a breather. Oil from all the engine is collecting in the crank case during bike is stays long period and when you starting the bike extra oil is starts leaking from the crank case breather. In a good day of welding i can lose up to a quart. Overfilling the crank case is the most likely cause of your problem. The breather tube is connected to the carburetor, which connects. My Scout does the same. 1987 - 1996 F150 & Larger F-Series Trucks - oil coming out of valve cover breathers - Hey all. is the oil coming out the breather element/mesh or at the seal? You may just want to try a tighter grommet if that's where it's coming out. Have some photos from it will be posting them directly. The cover no longer extends down to the crankshaft. I've also seen a small engine blow oil after it was stored in a very wet location: Water got into the crankcase, which caused the oil to foam upon starting. Smoke from the breather pipe. Now i changed the fuel filter today and there was not only crud in the bottom of the bowl but also appeared to have a slightly blackish look to it versus the. Wipe off grease rubber is positioned properly. Purchase the Kuryakyn Bluegrass Crankcase Breather Catch Can at J&P Cycles, your source for aftermarket motorcycle parts and accessories, with free everyday tech support. This is what is supposed to happen with motor oil. Along with all the other replys that are all possible, but looking at you're post I would bet you're super crapp exhaust is to restrictive and causing to much back pressure and it will show up in the same way yours did by blowing oil out the breather at higher speed for longer times. Flood I will hazard a guess because what you describe makes no sence at all. Water vapor enters the crankcase of all motors from the atmosphere, and as a by-product of combustion. Perhaps having the breather box there keeps the engine running longer when there is blowpack from worn cylinder/rings… as instead of oil spewing out it has to get out through the top tube…. I've seen it happen with exhaust gas and worn piston rings where exhaust gasses actually shoot into the crankcase and come out the port. I have a compression tester, but I have a little problem. Firstly, I need to let you all know that my knowledge about engines is at best, stuff all. Steam or smoke coming out of breather help! Hey guys, first let me say that I did a search before I posted this and I need more input than what I found. If there is a lot of air/oil coming out the hose or the oil fill cap, then there is most likely a stuck ring (or less likely a cracked piston). adding a bit extra crank case pressure and hence the oil. 372500 After starting and cuting a couple of strips oil starts to blow out the breather tube, white smoke starts to come out the other side of the mower, so I stop and reload oil. If you have a single, the piston is pumping 6-800cc of air in and out of the crankcase breather. but none of the oil present is fresh oil nor is the oil pan coated. What would cause oil to blow out the breather on a Harley Davidson Unless there is a bunch of oil coming out, it's not a problem Excessive crankcase pressure will cause this problem two. The engine has less than a 100 miles so I know the rings are not seated yet and I'm running without a hood so the breather is in the air flow. Re: Losing oil through crankcase breather. Problem:- Oil is blowing out of the oil tank breather hose in large quantities (confirmed that this is the source of the leak). The frothed oil contains many air bubbles, which starve bearings for oil (blown rod, even though there is oil in crankcase), and also allows the engine to blow oil out the engine breather. To start, you must realize that your engine is an air pump, and the piston(s) pump air on both sides of the piston crown. I'm thinking that the breather tube needs to be much taller and more vertical and this will help keep the oil in the crankcase. I have done a compression check and found that cylinders 2-8 are between 115 and 121 psi.