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10-21-2011
Hai i have 1997 grand prix which i recently bought last month or so and i love the car. but i feel i may have been screwed because i got it from an a hole friend.. the car just started making a horrible noise in the engine bay at idle only.under any kind of throttle it goes away.
Grand prix 97 - YouTube
ive been told possible harmoic balancer just looking for any other input thanks for the help.
10-21-2011
s/c coupler?
No belt on in video.
Interesting...
10-21-2011
oh i forgot to mention.. we took the belt off because we were making sure the S/C was alright. its fine i had replaced the coupler last week cuz of the noise still doing it tho
10-21-2011
How does it drive? It sounds to me like it's firing into the exhaust like either the cam timing is off or you got something wrong with the valvetrain.
10-21-2011
it seems to drive fine i guess
i havnt been getting on it since the noise started
FWIW i feel the noise is from the bottom end just cause its so much louder under the car
also i can feel the the vibration in the engine bay from what appears to be the noise
10-21-2011
does it make the noise when it is in gear? you also may want to jack the car up and grab long screw driver and find the noise.
10-21-2011
Flex plate
10-21-2011
make the noise in park neutral drive goes away under throttle tho
and flex plate?
10-21-2011
if it was the flex plate would it make noise when throttle is given? i could be wrong not sure its that tho
10-21-2011
O h g r e a t...
Mitch's car.
Sorry breh.
Anywho...
Flex Plate will make WAY more noise at idle than under load...most of the time you only hear it at idle for that matter.
10-21-2011
i did say a-hole friend
but we just jacked the car up and it makes way more noise near the driver side of the car so im guessing flex plate... umm nick wanna drive on up and help do a flex plate?
10-21-2011
Ummmmm...no.
LOL
I'll drive up there and drink beer and tell you guys what to do though...either way...replacing the flex plate means the motor is coming out or the transmission/cradle is getting dropped to make it easy.
10-21-2011
sheeet that will work can i drink with you while austin works? hahaa
seriously tho whats my best options for repair?
10-21-2011
If it is a flex plate?
New fluids.
New Flexplate.
New TTY FP bolts...thats about it...remove motor...remove flex...drop back in?
10-21-2011
hmm how do i make sure its the flex plate?
and i dont have the means of pulling a motor currently
10-21-2011
Remove plugs/wires, get big f'in screwdriver, turn flywheel tooth by tooth and check for cracks in the steel plate with a LED light would probably be your best bet.
10-21-2011
alright gonna go do that and let ya know
10-21-2011
Well if it something in the bottom end you can get to it while the motors out to do the flexplate so it's a win win
10-21-2011
This.Originally Posted by OH4CompG
And since Mitch built it/worked on it/ghetto rigged everything in it...
It wouldn't be a bad time to go through it regardless and learn about your engine.
10-21-2011
my vote is the flex plate as well. mine broke on mah gtp and only made noise at idle or while in gear with no throttle. sounded just like that.
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