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Original Message
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| RE: 428 oil pressure |
| By John - 01/07/2003 9:36:55 PM; IP 142.177.92.112 |
The pressure you get sounds about right...I find the following is normal with a HV oil pump:
Hot Oil:
Idle: 18-22 psi
2000 rpm: 60-65 psi
max pressure: 70-80 psi
Cold oil:
indicates max of 70-80 psi
Note: 20W50 may give you the high end of the 2000 rpm and hot idle figures, while 10W30 will probably show at the lower end. The max pressure will stay the same regardless of the oil weight as it is dictated by the oil pump relief spring. The only problem is the slow rate at which the pressure builds.
I had the slow rising pressure problem once and it seemed to be from an oil pump pressure release valve that wouldn't quite close. It was sticking from the day I put it in. If a plug had popped out, I doubt you would get the 70 lbs you have. Bearing clearances could easily allow for the slightly low readings you have compared to mine. If in doubt, try another oil pump...maybe even the original one if it was a HV unit. Inspection of your existing one probably won't reveal anything. |
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