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Typically its either worn or broken Piston compression rings.
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∙ 14y ago
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Do you have to use Harley Davidson oil in Harleys?
No.
What is blow back on 1990 Jeep Cherokee Laredo?
blow back or blow-by is pressure that builds up inside the engine causing oil to be blown out of vent,oil stick,oil filler cap, or into air breather.. Causes of blow-by ---- Bad PVC valve (Positive Crankcase Ventilation ) Worse case is worn piston rings or cylinder walls - engine needs to be rebuilt. http://en.wikipedia.org/wiki/PCV_valve
What causes oil to blow out the oil stick on 97 Ford Aspire?
Plugged PCV valve or hose
What causes oil to come back up the dipstick and drip on the manifold when you drive hard on a 1995 Caprice with police package?
Blow-by (Bad engine rings)
What grade oil goes in tank under seat on 883 harley that mixes with the gas?
Harleys don't mix oil with their gas. Harleys have "dry sump" oil systems; instead of there being an oil pan in the engine, a Harley has an oil tank under the seat. The grade you want is 20W50.
Why is there oil around your harleys carburetor?
the crankcase vents through the breather system.
Why does a harley Davidson motorcycle have an external oil tank?
Increase circulation and oil cooling. Not all Harleys have external tanks
Why do harleys have an oil tank?
some use a dry sump oiling system. This system requires the oil be pumped from a tank.
What causes engine blow by out the oil stick on Pontiac 455?
put on a new PCV valve.
What makes oil drip out the air cleaner on a 2003 harley Davidson sportster?
best guess is you need your top end redone or at least looked at. when a car has that problem it is called blow by . and that means worn out or damaged.ANSWER: Nothing is damaged or needs to be replaced. The above answer is correct that the problem is blow by. But that's all that's correct about that answer. When a cylinder fires, there is a small amount of burnt gasses that "blow by" the rings on a piston into the crankcase. In older cars, this was vented to the atmosphere. In newer cars and bikes, because of EPA requirements, this blow by gas must be vented back into the intake system. This "blow by" gas carries with it a small amount of oil. Harleys are notorious for weeping oil out of the air cleaner because of the "blow by" recirculation. Not a whole lot you can do about it (and stay EPA legal) except to be aware of it and clean the oil from the outside of your aircleaner occasionally.
Why is oil blowing back out of your throttlebody?
Faulty PCV system or engine blow-by.
I seem to have excessive oil pressurewhich causes oil to blow out around the oil filter What would cause this on a 2.0L KIA diesel Different brands of filters does not correct.?
your problem is your oil pump.it has a blow by ball and spring to release excess pressure and it is stuck closed. replace oil pump !
