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My engine is a 4AF 16 valve Toyota. Oil is coming out on the valve cover breather.

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Colin Stickland

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Either too much oil ,gauze filter is blocked or the filter in the pipe to the inlet manifold ,or its just had its day and needs a rebuild

Posted on Nov 29, 2010

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2 Answers

I have a 1988 Scottsdale 305 4x4 manual trans.its leaking oil so bad smoke rolls from under the hood when I come to a stop.i know the exhaust it lose but could it be just that?


Yup, oil is leaking directly onto the exhaust and burning. Fix the oil leaks, normally always the valve cover gaskets, and replace the pcv valve(PCV positive crankcase ventilation valve). See can you put another PCV valve in the other valve cover and run it to the breather. The more of these lines you hook between the engine and breather, the less it will leak because vacuum is pulling all the pressure out of the engine block and crankcase so it won't push the oil out. My 383 small block has a bad front main seal, I hooked up another tube and it can't push oil out the seal. No more leaks. Hope you get her fixed soon Bro, you really look bad with all that smoke coming from your truck.

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99 Chevy Malibu 2.4 engine. I check my air mass sensor and it was covered with oil and I see that I had oil in the combustion chamber. How to get out oil


Oil is coming from pcv or breather pipe. You probably have excessive piston ring wear causing blowby and forcing combustion gasses up the engine and into the breather and pcv system. Oil will come with the gasses if not filtered out. Check the pcv valve for proper operation and check any breather cap for baffles to keep the oil in the valve covers. Also consider getting an engine rebuild, if you want to keep the car.

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Oil smell smells like it is burning oil last oil change was 3 months ago


Common causes of smelling "burning" oil are:
  1. a leak in the valve cover gasket. When oil leaks from the valve cover gasket, it will often burn off on the manifold.
  2. a blown oil seal causing oil to burn off on the exhaust system
  3. check your exhaust for "blue smoke" a sign that the engine is actually burning oil. Just guessing here but a 16 year old Volvo is bound to have quite a few miles on it.
I hope you found this post helpful in diagnosing your problem. Thank you for using Fixya! Greg

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hi i have a 2001 1.6 zetec ford focus. the engine managment light is on and my car has bee leaking oil into the airbox on the floor and onto the gearbox coming from the rocker cover breather hose ( i have changed the camshaft breather hose and valve ) any suggestions ?

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2001 saturn with a 2.2 has oil coming from breather on top of valve cover causing it to puddle in air intake.Also have noticed odd noises coming from valve cover area.I had the engine running and removed...


pvc .valve could be defective or Eng worn out hope it is the first replace pvc. you can tell how thee engine is by having a wet & dry compression check done

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Check your PVC system my have stuck PVC valve

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Where is located the oil breather on 1991 nissan 300zx


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