Rattle in bell housing at idle
1990 Pontiac Bonneville

Rattle in bell housing at idle

(1990 Pontiac Bonneville)
Just started, goes away at higher rpms, starting sounds a bit different. I suspect a cracked flex plate
How long have you had this problem? 1 day
Tags: pontiac, bonneville
1 answer & 0 comments
Popular Answer
on August 01, 2018
Normally a “cracked” flex plate (flywheel) will produce more of a squeaking sound than a rattling noise - however that is quite possible.

Loose torque converter to flex plate bolts is another possibility.

In any event *hands-on* inspection will be required .. “Flexing” the flywheel using a prying tool will usually reveal cracking - trainer ear will recognize it straight away - as well as loose bolts to torque converter.

Good luck!
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General Diagnosis
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on August 01, 2018
Normally a “cracked” flex plate (flywheel) will produce more of a squeaking sound than a rattling noise - however that is quite possible.

Loose torque converter to flex plate bolts is another possibility.

In any event *hands-on* inspection will be required .. “Flexing” the flywheel using a prying tool will usually reveal cracking - trainer ear will recognize it straight away - as well as loose bolts to torque converter.

Good luck!
Sign in to reply

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