What to do when oil blows out of crankcase breather tube?
You will need to remove the spring & check ball from the inner pump tower; clean the check ball, replace if pitted & re-install. Crank over the motor with the plugs out & leads grounded until the oil is out of the cases. Re-fill oil tank, warm up bike & top off oil level.
What makes the breather blow by on a Harley Davidson?
Ever since the introduction of the EVO engine with breather heads and the use of high flow air cleaners , breather blow by has been an issue . The stock air cleaner assemblies forced most of the breather blow by to be recycled through the combustion chamber .
When did oil start leaking from Breather vent?
Discussion in ‘ Oil ‘ started by dontask, Aug 16, 2008 . I have a Hearitage Softail CLassic 1991, this year we have not done much riding weather been really rainy.
Why is my bike leaking oil threw breather?
My Bike is leaking alot of oil threw the breather. What could be the cause for that and how can I fix it? well, what motor, year and model of bike? evo motors vent the case through the breather. If you pullout your air filter, you should have an oily film on the mounting plate and around the rim of the filter. Its an evo engine.
You will need to remove the spring & check ball from the inner pump tower; clean the check ball, replace if pitted & re-install. Crank over the motor with the plugs out & leads grounded until the oil is out of the cases. Re-fill oil tank, warm up bike & top off oil level.
What causes oil to leak from Breather vent on Harley Davidson?
I spoke to “He who knows all” and he said it sounded to him like a sheared oil pump key. He also explained that if that key is sheared, it is caused by a more serious problem such as a scavenger gear bearing failure. Good luck.
What happens if the breather tube is blocked?
Although this benign little hose doesn’t require much maintenance, it does have one major drawback—a blocked breather tube can pressurize the engine and cause seals to fail. Those seals hold in oil, and without them, the engine will throw the black stuff everywhere, which may be quickly followed by it shutting down altogether.
What is the breather tube on an engine?
That small metal or plastic tube extending out of the cowling is the engine’s breather tube. Engines and moisture don’t mix, so getting rid of the harmful water vapor and any liquid water is important for keeping the engine safe and reliable.