Popping Sound - Chevy Impala SS Forum
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post #1 of 31 (permalink) Old 07-15-2004, 05:44 PM
tforbesSS
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Well I have spent many hours in the last year reading and taking in some good advice. I have finally got most of the parts for my suspension mods I want to do in. But in the last three weeks I have noticed a popping noise coming from my front end after stopping. It seems to happen after the car has come to a complete stop and then I let off the brake. I some cases the right front will actually jerk. July 4th I had all five of my lugs shear at the rotor while doing 90mph up I45 to Dallas(hair raising experience!!) so I thought that might be it. I had just rotated my tires and put new brake pads on the front in hopes it was old pads popping, but after getting her back on the road with new lugs, I quickly realized that wasn't it. I have a plethora of items I am gonna put on my front end in the next month or so. She has about 125000 miles on her and to my knowledge nothing has ever been changed out suspension wise. Any ideas on the noise?
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post #2 of 31 (permalink) Old 07-15-2004, 06:15 PM
AutocroSSer
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Check the alignment shims up front......betcha they are gone on one side.
post #3 of 31 (permalink) Old 07-15-2004, 10:09 PM
tforbesSS
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Having not messed with alignment much. What the hech is an alignment shim, even better, where would I look?
Thanks for the help, and sorry to be ignorant. LOL!!
 
post #4 of 31 (permalink) Old 07-16-2004, 12:23 AM
jayoldschool
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Quote:
It seems to happen after the car has come to a complete stop and then I let off the brake. I some cases the right front will actually jerk.
As Ed said, this is exactly the symptoms of missing alignment shims. Check the top A arm. Look at both sides, you will likely see them on one side. Or, just take it in for an alignment... you will need to anyways.
post #5 of 31 (permalink) Old 07-16-2004, 10:34 AM
G Man
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Happened to me....here's what the shims look like.
post #6 of 31 (permalink) Old 07-16-2004, 08:43 PM
tforbesSS
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Thanks guys. That takes some of the worry out of my head. I was planning on getting her aligned after installing all my new goodies anyway.
Thanks for help!! [img]smile.gif[/img]
post #7 of 31 (permalink) Old 07-17-2004, 12:21 AM
AutocroSSer
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Even if it IS the shims, you really should NOT drive around like that. The "clunk" is the A-arm MOVING on 2 very thin bolts

If you are getting aligned VERY soon (as in, 1-2 weeks....tops) what you can do is simply tighten the 2 nuts up to get the A-arm tight against the frame mount. Your alignment will be completely screwed up, but it'll be "safe".

Repeat : I would NOT drive the car until you tighten it up!
post #8 of 31 (permalink) Old 07-19-2004, 04:38 PM
claSSic Caprice
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Hmmm I have this problem too and was about to do the ball joints seeing how my front end parts by the right front wheel moved during hard braking.... I remember replacing my rotors which needed to be replaced and seeing some shims fall when I took off the wheels(didnt know what shims looked like at the time)...the popping and clunk problems came around a day or two before I did the rotors and have remained... I guess my car is not going back to SEARS for an allignment!!!
post #9 of 31 (permalink) Old 07-19-2004, 10:50 PM
claSSic Caprice
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I checked my car and of course it had no shims on the passenger side.... Driver side ok. Im going to find a good place to get it alligned. Anything I should mention before I get it alligned? (9C1 specs or something?)
post #10 of 31 (permalink) Old 07-20-2004, 11:12 AM
tforbesSS
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Quote:
If you are getting aligned VERY soon (as in, 1-2 weeks....tops) what you can do is simply tighten the 2 nuts up to get the A-arm tight against the frame mount. Your alignment will be completely screwed up, but it'll be "safe".
Thanks for the warning and info ED. I replaced my shocks and rotors, calipers and pads yesterday and thought about cranking down on the a-arm nuts, but took it straight to get aligned today instead. Was wanting to wait till my springs came in since I am gonna have to get it done again. Oh well, lifetime alignment at Firestone is $140, so they can redo when I get my springs in. Thanks guys!!
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