1997 Toyota 4Runner knocking in motor

1997 TOYOTA 4RUNNER
177,000 MILES • 6 CYL • 4WD • AUTOMATIC
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FATTAPIG
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I have a bad knocking in the back of my motor. I just had the oil changed the day before it started.When you first start it up when its cold the motor does not knock for about 5 minutes. Can anyone please tell me what to do . Thanks Danny
Feb 20, 2008 at 11:44 PM
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RASMATAZ
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Knocking noises is it a clicking/tapping/rapping/thudding/thumping noise-

Might want to check the oil pressure for a start. could be a clogged pick up screen/sludge/weak oil pump/engine bearings etc.
Feb 21, 2008 at 12:05 AM
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FATTAPIG
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Its more like a thudding, its bad enough that I am afraid to drive it. Should I try a motor flush? Thanks Danny
Feb 21, 2008 at 9:53 AM
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RASMATAZ
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You can try engine flush-don't work check the oil pressure. The knocking sounds like rod bearings
Feb 21, 2008 at 1:43 PM
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FATTAPIG
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I am going to check the oil pressure , Would it be rod bearings if it runs good for about 5 minutes at cold startup? Thanks again
Feb 21, 2008 at 1:57 PM
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RASMATAZ
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Could be who knows-knocking in the lower portion of the engine can be the rod or main bearings -check the oil pressure.
Feb 21, 2008 at 2:19 PM