Too all you gearheads out there....I have a question!!! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-03-2005, 04:22 PM   #1
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Default Too all you gearheads out there....I have a question!!!

I have a 1989 Bonneville SSE. After much work and hastle I have pin pointed my rattle in my engine at idle......The annoying and sometimes loud rattle is coming from my Crank pully or crank....I dont have a service manual as of yet as Im on kind of a budget. I was wondering if anyone could shed some light on possiblities on what it could be and what it might take to fix?

Thanks in advance Guys

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Old 04-03-2005, 04:29 PM   #2
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The crank pulley (harmonic balancer) is built with a rubber ring between inner and outer metal portions. The rubber can get cracked because of age and allow it to rattle really bad at idle. It'* a few hours of labor, the part itself is somewhere around $150, I think.
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Old 04-03-2005, 04:37 PM   #3
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so thats about 900 canadian right? LOLOLOL Im a canuck remember :P

Well its not as bad as I thought!

I am a bit relieved
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Old 04-03-2005, 10:41 PM   #4
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It would be really strange if it was the same thing mine did saturday I heard a metallic "tink tink" sound as the car idled, coming from somewhere on the front of the engine. It ended up being the crank sensor-somehow it came loose & was just barely touching the balancer ring as the engine rotated. A slight adjustment & all was fine.

Just take the belt off & start the engine for a second, you should be able to pinpoint if the noise is coming off an accessory or the crank area.
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Old 04-04-2005, 10:00 AM   #5
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did all that...it still makes the noise....it is less noticable with the belt off...but it is still there..the harmonic balancer is the issue
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