Quote:
Originally Posted by FatBoy
I've dropped the oil pan and taken off the oil pump. The pressure relief plunger initially felt as though it was jammed, but it moved freely enough now after spraying some cleaner in there and working it up and down a few times. |
Was it jammed or not? That is the question. Now it moves freely. Are you sure it did not initially move as freely. Unless you can be certain here, you really have nothing at this point. If you put it back in and the pressure still does funny things, you are still going to suspect the pump or PRV. Again I would advise you to verify the pressure with a mechanical gauge.
Quote:
Originally Posted by FatBoy
However, for the price of a new 57HV pump, I'm tempted to just fit a new one.
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If you change out the pump and you still have funny pressure readings, at least you will know it isn't the pump.
Quote:
Originally Posted by FatBoy
There was nothing inside the oil pan that wasn't supposed to be there, so I'm reasonably happy that there isn't something seriously amiss elsewhere in the engine. |
Make certain there is noting on the oil pump screen and nothing hidden behind a trap door that might come out and cover the screen. Also verify the pump is not too close to the bottom of the pan. While you have it apart check everything you can think of that might cause a problem.
Good luck.