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2000 Chevy Mailibu - knocking noise

Tiny
BDUB7401
  • MEMBER
  • 2000 CHEVROLET TRUCK
When I first start my car up in the morning there is a loud knocking noise. After the vehicle warms up, it queits down, but continues to knock. If I start the car up when its warm, it still knocks, but not loud. The knocking noise doesn't get any louder or softer when accelerating or deccelerating. Any ideas?

Thanks
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Wednesday, March 1st, 2006 AT 7:51 PM

2 Replies

Tiny
MECHANIC116
  • MEMBER
  • 28 POSTS
"KNOCKS" are extremely hard to diagnose in this medium, unfortunately. It could be a number of things. To be sure though, it is not good. You need to take it to a trusted, experienced mechanic and let him listen to it, in order to get an accurate diagnosis. Good luck.
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Friday, March 3rd, 2006 AT 4:28 PM
Tiny
KEVINDARLENE
  • MEMBER
  • 3 POSTS
I have a 2001 Malibu. Same problem, knocking loud when first started, knocking but never really quieting down. When the dealer took the engine apart, they discovered that the pistons were hitting the cylindar wall. Hence the engine was replaced.
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Friday, March 3rd, 2006 AT 7:54 PM

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