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1997 Toyota 4Runner knocking in motor

Tiny
FATTAPIG
  • MEMBER
  • 1997 TOYOTA 4RUNNER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 177,000 MILES
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
Wednesday, February 20th, 2008 AT 11:44 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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Thursday, February 21st, 2008 AT 12:05 AM
Tiny
FATTAPIG
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  • 3 POSTS
Its more like a thudding, its bad enough that I am afraid to drive it. Should I try a motor flush? Thanks Danny
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Thursday, February 21st, 2008 AT 9:53 AM
Tiny
RASMATAZ
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You can try engine flush-don't work check the oil pressure. The knocking sounds like rod bearings
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Thursday, February 21st, 2008 AT 1:43 PM
Tiny
FATTAPIG
  • MEMBER
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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
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Thursday, February 21st, 2008 AT 1:57 PM
Tiny
RASMATAZ
  • MECHANIC
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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.
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Thursday, February 21st, 2008 AT 2:19 PM

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