94 Ford 4.6L delayed oil pressure on start up
I have a 94 Ford Thunderbird with a 4.6L engine. During start up I have zero oil pressure for 15 to 30m seconds when the car sets over night. Once the pressure kicks in the lifters quiet down and the pressure appears normal. The problem does not re occur during the day but it's the same thing the next morning. I decided to have the engine overhauled, long block, but the problem persists. It's like the the oil pump has lost it's prime. Is there a check valve in the system that could be failing? Incidently I discovered in the overhaul process that the cam shaft bearings were badly scored. I would appreciate your comments on this subject. My I mail address is [email protected]
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