Question about 2001 Jeep Cherokee

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Sounds funny i replaced the valve cover gasket in my 1990 jeep cherokee becuase it was causeing oil to blow back in to my air filter but know when i start it up it sounds differant and the exhaust seems to smoke and the grond at the end of the exhast is black

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It is possible that your PCV Valve is not functioning as well as it should,,,also,,it may be that your engine has excessive wear in the piston rings and lower oil rings,,causing excessive blow by into your engine crank case.
This will of course affect how your engine runs and how much oil is consumed.
Check PCV valve and replace as neccessary.
If this doesnt work,,i'd suggest taking it to a mechanic.

Posted on Jan 19, 2009

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1 Answer

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Sound like a head gasket is leaking. The coolant is leaking from the water jacket through the failed gasket in to the engine crankcase. The "blow back" is caused by the combustion inside the cylinder to leak into the water jacket, pressurizing it.
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Replace the PCV valve it is stuck closed.

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Your Jeep is Burning Oil. Do you need a Quart every Now and Then? The only way to fix this is to get the Piston Rings Replaced and is not Cheap. There are a Few Additives on the Market that you can put in the Motor to Minimise the Problem for a While. You need to go to Your Auto Parts Store and see what is available in your Area on these though. Please Rate My Response! Thanks!

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