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Another thing I left out of the original post ,is the fact that when the block gets to operating temp, its almost like someone flipping a switch and instantly I'm at 40psi for the rest of the day or until the block cools off again. Sound like some kind of valve (high pressure bypass sticking)...

Thanks for the reply, I used the flush made by GUNK in the grey bottle, from Autozone. , It seemed to help the over-all flow. But I still had problems maintaining pressure. I never heard about the check valve. I assume the crosscheck list at the store would list the correct filter.As far as Oil...

2007 Low oil level: at Idol I'm having problems myself with oil pressure. Has a pressure of around 30 when Idol, If i Idol to long I will begin to hear lifters ticking. It will achieve 40+ only after the block heats up to temp. Been doing research on the oil pump, high pressure bypass valve...

2007 Low oil level: at Idol I'm having problems myself with oil pressure. Has a pressure of around 30 when Idol, If i Idol to long I will begin to hear lifters ticking. It will achieve 40+ only after the block heats up to temp. Been doing research on the oil pump, high pressure bypass valve...

My 1995 has 301,128 miles and going strong with NO engine work, 1 tranny reverse clutch repair, 1 rear-end.