Any help would be appreciated . Too much oil coming out of crankcase breather! Reply. Thick black smoke usually indicates the problem is more advanced, and built-up pressure is forcing oil into the cylinder where it burns off and sends black smoke through the exhaust. The oil that is coming out is not a steady stream at first (spits and sputters) but as it runs it gets more constant. As I got back I noticed that a good amount of oil had started dripping from I'm assuming the hose giving off smoke as well. This is typical after a bottom breathing bike sits for a prolonged period of time. there are other possibilities, but they are not as easy or cheap to fix as an overfilled oil tank. Thing is, it’s got a pitcock valve to drain the collected oil about every 50-100 miles. When you say that the oil return lines may be plugged I assume you mean the ones from the heads. Save Share. There was a small amount in the airbox when I switched over to ramair, saw the same on the block and bought tubing to run it to my ramair. I had a hard time finding the small oil draining hole. BeatersRus FBBO Gold Member FBBO Gold Member. This pressure was so grat that it was causing oil to bypass the greater valve. quite a few people including me on this site had had an issue with oil coming out of their crankcase vent the only solution I have ever seen is to loop the vent line, which I did. He came got it again but this time, rigged a recepticle “canister” to collect the oil blowing out of the crankcase breather line. make sure when the oil is hot, you can look into the oil tank and see inside the tank. Feb 22, 2016 #8. rickybobby Road Train Member. the most common cause is an overfilled oil tank. Still have oil blow by though through the breather on passenger side. The truck seems to idle ok and seems to have good power. Once there, the only way it can get out is through the drain tube on the bottom. Even at 2% it's still enough air to be audible coming out whichever other cylinder also has its piston at TDC (can mute the sounds with a finger in the plug-hole) and hear the air glugging through some oil that settled in a downward bend in the breather-tubing. Customer Service August 30th, 2017 . I now have oil blowing out the valve cover breather on hard acceleration.At idle you can see the oil blowing in the breather hole ,but not comong out. I agree that excessive crankcase pressure my well not be the only cause of oil coming out of the the crankcase breather, but it is certainly sufficient. Ever since I got the truck it seemed to smoke a little more than normal while it was stock. Oil has sumped into the bottom of your crankcase and is blowing out of the breather line. This is what is supposed to happen with motor oil. Since the air has to go somewhere I'm not worried about either of those. They put about a hundred miles on it yesterday and the oil is still coming out. Last weekend mine pumped just about all the oil out of the crank case into the airbox and stopped. Might be time for an oil change. Even if the case is sumped the the oil will blow out the breather as soon as the engine is started then the pump will catch up and keep evacuating the case. At 27000 miles the oil started to come out of the breather. if you remove the oil cap with the engine running, oil should not spit out. ... i built from the ground up the motor has been completely rebuilt.when it sits for a week or two and i start it it pukes oil out of the crankcase breather tube .it stops afte … read more. As oil ages, it's lubrication properties break down. Bike has a … The picture shows antifreeze ant the bottom of the tube and a mixture of oil/antifreeze higher. Reply. If I drive this thing 100 miles, it loses 1/2 gallon of oil. KB3MMX Thanks this. Filled oil tanks and started it up again I guess I hoped as it the engine heated up the clog might dislove. Hi Isaiah. The shop has got it now under warranty. With today's overhead valve engines it is never advised to reuse a head gasket. Thanks for the reply, Greg. I&C technician. 7,949 satisfied customers. It ran all three qts out. I crawled under it while it was running and oil was coming out of the crankcase breather and smoke. The customer writes, "My crankcase is puking oil. Open the inner tower to inspect for any foreign debris that may keep the check ball (bearing) from seating. Anyway, this weekend I had a chance to pull the breather off. Any ideas on what the problem might be? I will know better about it later when I get off work. whats the fix ? It is still coming out and it actually blew the cap out of the oil tank. My truck was doing the same thing. Looks like I need to investigate also. Consequently, what does a breather hose do? intake. It took about a hundred miles before it leaked more oil than before. I have lots of oil coming out of the crank case breather , on a 96ci ultama moter. The dealer then relined the oil pump again and checked the seals. In order for the PCV system to sweep fumes out of the crankcase, the crankcase must have a source of fresh air. It was tucked into a corner of the breather unit and very small. I have a PCV valve in the other valve cover.No smoke out the exhaust. Took my mopar performance covers of cause they leaked like a sive and put on stamped steel covers no leaks there now. I vented the crankcase breather down the back of the motor like you suggested and now I'm getting excessive oil coming from what I believe is the hose and higher RPMs -- to the point of it coating the swingarm and sidewall of my rear tire. P.S. The breather is usually provided with baffles and filters to prevent oil mist and vapour from fouling the air filter. Also, the suction could help with the valve cover gaskets bulging after the change to ramair/k&n also . What could this be head gasket,valve seals,or something else.I'm going to do a compression test tomorrow. Help! I had no problems before 27000. i have an rmz 250 oil is coming from out of the crankcase breather hose it’s got good compression so i doubt it could be the rings any idea what the problem could be? SOURCE: 89 Harley FLTCU oil coming from the crankcase breather tube and. Still not over flowing out of the vent tube but still. The crankcase breather tube is at the top of the crankcase, just below the pistons and hangs straight down to the bottom of the engine pointing to the ground. When I went to start her she started right up then I notice oil pouring out of the oil breather vent tube. You might want to look for a crankcase breather on the side of the block.--- Bror Jace. This is an age old problem for the Harley engine. Suggestions Please There's also oil on the "T" but that is probably just where it dumped from the hose. There’s oil coming out through the dipstick and crankcase breather, not imagining things, I’m going to check the catch can I might have over-torqued the banjo bolt on the catch can, I’m going to clean the oil and re assemble the catch can, I found out this is the updated radium catch can produced on November 2020 might be a bad batch ?! The source of this fresh air is the "crankcase breather", which is usually ducted from the engine's intake manifold. To much oil in the crankcase will be expelled out the breather tube. Vocational, Technical or Trade Scho. Nope it still does it right after engine starts. During acceleration the compression of the engine will push oil past the rings, into the crankcase. I have a 82 CM 450e and during a routine trip back and forth around town I realized that some white smoke was coming out of the crankcase breather hose and continued to become thicker as the bike warmed up. I’m thinking about replacing my breather assembly on my rocker arm assembly but was wondering if that was a good way to go. I’ll update . I believe oil separator can not be drain; the functions of it should be recycling the oil/vapor coming out the crankcase breather tube to the engine. As far as I could tell, the oil only came out of the crankcase breather hose. White or blue smoke coming from the exhaust pipe is a strong indicator that the crankcase breather is clogged. My tractor makes twice as much of the crank case into the oil tank have good power the block. -. Ones from the exhaust injector stuck open or some other major engine problem much oil in the other cover.No... Breather off weekend I had a hard time finding the small oil draining hole as it could sumped! 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