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Old 02-06-2021, 05:54 PM   #2
Bill Murray
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Join Date: Apr 2000
Location: Speedway, Indiana
Posts: 2,138
 

2007 ION-2 Quad Coupe
1997 SC1
Default Re: Occasional left-front knock sound

Best to get it up on a lift where you and/or a tech can take a close look.

The 07 Ion I purchased last year had a random problem like this and it turned out to be the brake pads. Whenever the previous pads were installed, someone had applied CRC "brake quiet" liquid damping material that's supposed to go on the BACK face of the pads on the tabs where the pads slide in the caliper. This kept the pads from moving properly, getting hung up in the caliper and randomly making noise.
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