Question about 1995 Ford F150 Styleside Regular Cab
5. 0 engine with 170,000 miles
I'm going to guess it's a blocked oil return in the head under the valve cover. If it fills up the rocker cover, the valve seals can't handle that much oil and it gets into the combustion system. Try looking through an opening, oil cap, PCV valve opening to see if a lot of oil is pooling up.
Otherwise, it could be the PCV valve if causing pressure in the rocker cover. Or valve stem seals if it's worse on acceleration after coasting down. Good luck
Posted on Mar 06, 2009
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