My 2002 Nissan 2.5 Altima has oil pooling on top of one piston and burning oil out the exhaust at the rate of 2 quarts per 15 to 20 miles what could this be. No water in oil or oil in water.

Asked by Apr 20, 2015 at 10:36 AM about the 2002 Nissan Altima 2.5 S

Question type: Maintenance & Repair

2 Answers

21,745

if oil is getting into the combustion chamber, it gets in through the rings or valve guides- since you say it is "pooling" (how do you know?) I would guess worn valve guides-

I know it was pooling because I pulled number 4 spark plug and I could see it pooling on top of piston and i removed valve cover and could see it also new valves have been put in but not new seals by prior owner

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