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post #10 of Old 06-04-2012
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Re: Oil Scare - Universal M25

Maybe just replace the engine oil pressure relief valve? Although when you changed to the Bosch oil filter you had a steady 25 lbs after an hour run? I remember on another thread some time ago someone had a similar problem and switching to the proper filter solved the problem. Not familiar with your particular engine but 25 lbs doesn't seem like a lot of pressure at higher engine speeds? If you have a shop manual it probably has the pressure specs in it. Blow by, is it noticeably more than last season? Any sudden change may mean
an "event" has taken place inside the engine. Hard to say how much is too much without seeing it or seeing how much liquid oil is coming out with it. Did the breather go back to "normal" after you re-changed the oil & filter? Overall, if you were running it hard with little or no oil pressure for very long it would be toast, but some damage could happen and the engine could still be running. A compression test may show ring, piston, or bore damage. Might be a good idea to try a mechanical gauge, at least temporarily, just to rule out any sender or connection problems.

Paul T
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