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Old 07-17-2020, 10:25 AM   #3
grumppyoldman
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Join Date: Apr 2017
Location: Texas Gulf Coast
Posts: 706
Default Re: Problem with high oil pressure?

My 41 V8 did the same after re-build now it will go up to 80psi. on start-up then drop back to 40 when running and 20psi at idle when hot. I use 30wt. Valvoline Racing oil because it has zinc in it which is needed for these flathead engines with flat tappet lifters. With it running at idle all you can hear is the fan belt squeeking. Al
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