2004 Chevy Impala Knocking

MSLAIDEE06

MEMBER
2004 CHEVROLET IMPALA
6 CYL
FWD
AUTOMATIC
91,300 MILES

I just had my trans. Overhauled and about 2 weeks later, I'm hearing a knocking sound and also, my thermostat is moving up and down and I smell something burning. I keep my maintenance up on my car, so therefore my engine oil is clean. What could be the possible causes?

3 Replies

MMPRINCE4000

MECHANIC
8,549 POSTS

If the knock is only on startup or shutdown, or reving the engine, it is possible they did not properly tighten the torque convertor to flexplate bolts.

Check the coolant level and for any leaks.

In any case if this started after the transmission removal and install, I would take it back to the transmission shop and have them fix it.

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Wednesday, June 25th, 2008 AT 7:00 AM

MSLAIDEE06

MEMBER
2 POSTS

Thanks a bunch u practically describe what is going on with my vehicle, it knocks when I start, shutdown, and rev up the engine. When I first heard the knocking and brought the car back to the shop, I though it was the engine and the mananger held my car for a week steading telling me it was the engine and when I asked him exactly what was wrong he still couldn't tell me. So as I was waiting for them to pull my car around one of the mechanics informed me that it is my flywheel or something about some bolts. I really appreciate u taking the time out to answer my question.

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Wednesday, June 25th, 2008 AT 6:33 PM

MMPRINCE4000

MECHANIC
8,549 POSTS

All they have to do is to remove the inspection plate and tighten the flexplate to torque convertor bolts.

Unless they stripped the bolts or the threads on the convertor, in which case repair would be on their dime, not yours.

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Thursday, June 26th, 2008 AT 12:37 PM