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2000 Toyota Corolla Knocking at every startup

Tiny
HEMANKAPS
  • MEMBER
  • 2000 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 118,400 MILES
Hi,

I have a 2000 toyota corolla LE 4 cyl. There is a knocking sound whenever the vehicle is started and run for a couple miles. This knocking goes away eventually.
But when the engine is restarted, even if it is warm/hot, the knocking again comes for a few miles.

How to fix this problem? Any pointer or help is appreciated. Atleast throw some light on the problem area.

Thanks
Himanshu
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Monday, October 18th, 2010 AT 1:33 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like a lifter leakdown problem -when it pumps up the noise goes away
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Monday, October 18th, 2010 AT 1:46 AM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
If it was a main/rod bearing, it would not go away.

Possible lifter, but I would also check the accy. Drive, like the tensioner.

On cold engine, remove belt(s) and start engine for a minute, if no noise, then a belt driven accy. Is problem.
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Monday, October 18th, 2010 AT 8:34 AM

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