Quote:
Originally Posted by boaterbob
I've had a couple 390'S with that problem turned out even with putting Rods and Mains in the problem was still there. They lose the pressure because of bad cam Bearings. First check is the guage of course.
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Thanks for the input. If it is the bearings, why is the pressure initially high, with it going down only after the engine warms up? I do not doubt that could be the problem.