Quote:
Originally Posted by lo_jack
Oil coming in from the top has probably gotten through the valve cover gasket, specifically the little part that seals out the coil pack to plug hole. You will want to clean everything out, change the gasket and run some good gas in it to clean it out. You are probably running at least a bit rich right now to compensate for the oil. How many miles are on your forward 02 sensors?
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OK, so its just a matter of replacing the valve cover gasket. That isn't that big of a deal.
Is this a common issue with the V8 X5?
I am going to guess the 02 sensors have never been changed, 67,***.
What about the replaced coil pack? Think the oil leaking had something to do with it needing to be replaced?
I didn't notice some better mileage with these new plugs.