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Old 05-09-2015, 05:23 PM   #8
wyoboater
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City: Clear Lake Shores,Tx
Country: USA
Vessel Name: In Disguise
Vessel Model: 1985 Mainship 40 DC
Join Date: Aug 2014
Posts: 483
I'm not familiar with the Lehman characteristics and don't know the optimal oil pressure. However, in my 20+ years of over the road truck experience, I know that different manufacturers use different systems. Cat uses low volume/high pressure so that optimal is 40-60 psi. Cummins uses high volume/low pressure so typical oil psi runs between 15-20. So, my thoughts are use the mechanical gauge to get accurate pressure, then contact a Lehman guru and find out it's optimal pressure. Then, go from there. And I agree, oil pan leak is probably unrelated and is caused by loosening of the pan due to gasket shrinkage as previously posted.
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