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Old 07-10-2009, 03:37 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #10 (permalink)
lacroixdp Offline
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From: Normal, Illinois
Registered: Aug 2004
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These oil pumps are extremely robust... I would not suspect that as a failure, at least not at first. The relief valve would have to be stuck in the open position to cause this problem... I doubt that's the case as well. Most of the time, they get stuck in the completely closed position, not vice versa. Get a oil pressure gauge from HF and check it at the head. If it really is low, then you can unbolt that relief valve on your oil housing and check it if you'd like. If you're getting knocking, it's possible you've spun a bearing or you just have plain old excessive bearing play causing your low pressure. You could easily check this by dropping your pan and removing a main. If your gear bolt for the oil pump fell off, it would cause you to lose massive amounts of oil, which obviously would affect your pressure. Good luck!


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