Friday, January 8, 2010

Why is there oil in my air filter?

yea my air filter is totally covered with oil. I dont know how this happened im pretty sure there isnt supposed to be oil on it. Does anybody know whats going on? and if so how can i fix it?


by the way the car is a 2000 mustang 3.8L engineWhy is there oil in my air filter?
The oil is from the tube that supplies your engine clean air for the pcv system. In an ideal world, the air is supposed to be sucked into the engine from the air box and mixes with the combustion gases in the crankcase, to be sucked out and burned in the cylinders through the pcv ( one-way) valve when the engine is running. During certain conditions, the air flow reverses and blows these gases and oil vapor into the air box.( deceleration) Disconnect the 1/2 inch hose mounted on the air box that leads to the engine and with the engine running, check if there is vacuum there. If air is blowing out, replace the pcv valve. A minimal amount of oil in the air box is normal. I have seen excessive amounts before, especially in sports cars where the driver is constantly downshifting to stop. To stop this is more driving modification rather than engine work. If the supply tube is between the filter and the throttle body, you may want to clean your throttle body and intake since at least four times the amount of oil that is on the air filter has been sucked into your intake.Why is there oil in my air filter?
are you sure it`s not a Vw.....ha....
well that sucks. and sounds like something MAJOR. I would not drive it very far. OR just tow it to a repair shop. Goodluck on that.
Replace you PCV valve, if this does not fix it then you have either a broken or stuck piston ring.........sorry
PCV valve is bad. Replace it.
back long time ago.in1953-4-5 they had oil bath on filters,,but thats long time.take top of filter off to see where its comming in,hold a dollar in front of exhast,if it trys to pull $bill back in rather out.it sounds like a dropped valve.if you got oil in water u could have a cracked head.i'd go to a good shade tree mech.let him ck.it out%26lt;%26gt;IS%26lt;%26gt;
check PVC valve and any vacuum hose that may have a hole pr crack,Clean it out again and drive it and then look for any leak that would put oil in there , also look at valve covers, hope this helps.
Could be piston blow by,that means your engine breather system is blocked and so building internal pressure up and forcing oil into places it should not go.


There should be a engine crankcase breather located somewhere in the engine compartment this needs replacing,failing that you may have a more serious problem.
Best case scenario; you left the cap off your oil fill. Second best is that is leaking in from somewhere other than the engine. Worst news is that you blew your head gasket. Sorry, but I don't see any good news!
PCV system is blocked, or too much oil in engine, or piston rings worn out

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