Join Date: Aug 2002
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Mystery oil leak
I have an 87 with an oil leak that it can't pinpoint. It appears to come from the area around the distributor or the rear of the head. I can't find a point of origin. I go through a qt. of oil every 50 miles! Due to this, I would expect to see a steady drip while the engine is running, but don't see one.
Also, I suspect the O2 sensor is bad. I sometimes hear a knock while I am accelerating, but not all the time. Prior to the knock I replaced the plugs, wires, rotor and cap, and checked the timing. Also replaced the restrictive breather box for a K&N conical filter, all of which increased mpg about 4.
Could the sensor be the problem or is there something else causing it?
All input is appreciated