Oil pressure Drop

1995 TOYOTA 4RUNNER
190,000 MILES • 6 CYL • 4WD • AUTOMATIC
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AUDREYS
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I have a 95 4runner. The oil pressure gets very low when truck gets warm Heard some valve rattle too but went away when i put it in overdrive. I checked the oil after it cooled and it was fine. Any ideas?
Jan 26, 2011 at 3:26 PM
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MMPRINCE4000
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Check the oil pressure with a mechanical gauge first, if low then possible oil pump. But could also be main bearing wear,
Jan 26, 2011 at 3:37 PM
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AUDREYS
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Im assuming this is a garage needed type thing being i have no knowledge.
Jan 26, 2011 at 3:45 PM
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MMPRINCE4000
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Modern cars use an electrical oil pressure sender, these can go bad. A mechanical gauge screws into the electrical sender hole, rotate engine and you will get an actual OP reading.

Yes a garage will have to do this, my concern is that you are hearing rattling, a sign of low pressure.

Toyota uses a oil pump that has a bypass spring, these can go bad causing low or little oil pressure.
Jan 26, 2011 at 3:49 PM
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AUDREYS
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Thanks for the information.
Jan 26, 2011 at 3:52 PM
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MMPRINCE4000
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Thanks for using 2carpros.
Jan 26, 2011 at 6:12 PM
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