1998 Isuzu Trooper Odd oil pump issue

1998 ISUZU TROOPER
143,000 MILES • 6 CYL • 4WD • AUTOMATIC
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GLAESEMANN
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I have an odd reoccurring oil pump problem. When I start the car on most mornings I can hear the distinct ticking of low oil pressure. If I turn the car off and restart it goes a way. Some times it may come back in a mile or so. Again if I turn off and restart it goes away. This time for the rest of the day until it cools down, then the cycle starts over again. If I do not restart and keep driving the ticking will get very strong and not go away immediately, but all of a sudden it will stop but it takes a much longer time than restarting. What could be causing this?

Thank you!
Jul 15, 2009 at 12:37 PM
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RASMATAZ
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Sounds like the oil pump pressure relief valve is sticking
Jul 15, 2009 at 2:37 PM
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GLAESEMANN
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[quote:9bf1428631="rasmataz"]Sounds like the oil pump pressure relief valve is sticking[/quote:9bf1428631]

Hmmm, I thought the relief valve was in the filter. But I looked it up and see there are two. Can the relief valve in the oil pump housing be removed and cleaned or at least inspected for scoring or build-up... or do I need to replace the entire oil pump? :-(
Jul 15, 2009 at 4:23 PM
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RASMATAZ
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Could be sludge causing it-try engine flush don't work and it continues replace the oil pump.
Jul 15, 2009 at 6:09 PM
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GLAESEMANN
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[quote:9273d6f933="rasmataz"]Could be sludge causing it-try engine flush don't work and it continues replace the oil pump.[/quote:9273d6f933]

Something like SeaFoam?
Jul 15, 2009 at 6:23 PM