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Old 11-17-2009, 12:18 PM   #1
TvSteve
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1999 SW2
Default Rattle in rear, bad strut mount?

Jacked up the rear to adjust the brakes and now the car has developed a rattle going over bumps (97 SW2 84K). Inspected the rear suspension and everythings tight. Sway bar dogbones ok. Pushing in on the top of the mounted tire I get movement on the top of the left strut. Car is jacked up on the jack points under the rear door. Car was solid before I Adjusted the brakes.

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Old 11-17-2009, 12:30 PM   #2
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1997 SL
Default Re: Rattle in rear, bad strut mount?

Adjusting brakes wouldn't cause such a problem.
Suspect a worn wheel bearing. Or loose or worn strut. Or loose strut mount or attachment to body. Hard to diagnose on the internet though.
G/F's L-200 had bad sway bar links (in front) and even the one that seemed OK was bad.
But SB links wouldn't cause play in the wheel.

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Old 11-17-2009, 01:14 PM   #3
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1999 SW2
Default Re: Rattle in rear, bad strut mount?

Quote:
Originally Posted by MikeNW View Post
Adjusting brakes wouldn't cause such a problem.
Suspect a worn wheel bearing. Or loose or worn strut. Or loose strut mount or attachment to body. Hard to diagnose on the internet though.
G/F's L-200 had bad sway bar links (in front) and even the one that seemed OK was bad.
But SB links wouldn't cause play in the wheel.
Could I have damaged the wheel bearing when I removed the brake drums? They were rusted on and I had to use a large hammer to break them free, banging between the wheel studs. On second look I have slight wheel movement at 12 and 6 oclock.

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Old 11-18-2009, 04:29 PM   #4
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1997 SL
Default Re: Rattle in rear, bad strut mount?

Hmmmm how hard did you have to hit the drum?

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Old 11-18-2009, 06:29 PM   #5
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1999 SW2
Default Re: Rattle in rear, bad strut mount?

Quote:
Originally Posted by MikeNW View Post
Hmmmm how hard did you have to hit the drum?
Not hard enough to damage the wheel bearing. I took a third look at the problem this morning and if I grab ahold of the strut I can see and feel movement at the top. This weekend I'll pull the strut and see what's damaged. Any tips on what to look for?

Steve

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Old 11-20-2009, 02:12 PM   #6
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Default Re: Rattle in rear, bad strut mount?

Have you eliminated the exhaust as the source of the rattle yet?

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Old 11-20-2009, 08:17 PM   #7
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1999 SW2
Default Re: Rattle in rear, bad strut mount?

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Have you eliminated the exhaust as the source of the rattle yet?
The rattle ---was--- comming from the left rear wheel area. The exhaust was tight and a loose heat shield was secured, still there. Like I said in an earlier post I was able to get movement from the strut. Banging on the strut with a rubber hammer reproduced the noise ---but--- yesterday the rattle completely disappeared. This was a loud rattle that could be felt and heard with the radio and heater on. Satty must have seen the UPS truck with the new strut mount. Go figure???

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Old 11-20-2009, 11:55 PM   #8
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1997 SC2
Wrench Re: Rattle in rear, bad strut mount?

If the wheel bearing was bad (loose), most likely it would have looseness in all directions, not just up and down (12 and 6 o-clock). More likely either it wais the strut or the strut mount. Besides, the wheel bearings are actually pretty tough. They have to be.

I had to replace the rear struts on my SC2 a couple of weeks ago because of a mysterious dull rattle and general looseness in the back end. It was the struts, no question about it, problem resolved. The old ones had some side play in them plus they would "skip" as I bounced the back end of the car up and down.

The mounts looked like they were brand new though.

If your struts are mechanically marginal and/or getting low on oil, while jacking the car up to the point where the strut is more or less fully extended you might have dislodged something internally or gotten an air pocket trapped below the piston. Either of these conditions might or might not work themselves out eventually. Better just to get new struts.

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Old 11-21-2009, 11:55 AM   #9
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1997 SL
Default Re: Rattle in rear, bad strut mount?

I just put a set of KYB on my car, what a difference
I am in the pot-holed town of Youngstown temporarily, the car really is tight, no junk shake from the suspension.
For the back, I didn't change the strut mounts, just installed new struts.

...
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Old 06-26-2011, 04:19 PM   #10
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Default Re: Rattle in rear, bad strut mount?

The problem was your brakes, specifically the 2 pins on the disc brakes. The pins will wear out very quickly on the outside pad resulting in the pad rattling. It is VERY loud. I figured it out after removing the strut and shacking the hub myself. I hit the pins with a hammer bending them enough to take the slack out and the noise has disappeared. I know this is late but I hope someone else will read this and help themselves.

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Old 06-26-2011, 06:00 PM   #11
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1999 SW2
Default Re: Rattle in rear, bad strut mount?

Quote:
Originally Posted by lostathome78 View Post
The problem was your brakes, specifically the 2 pins on the disc brakes. The pins will wear out very quickly on the outside pad resulting in the pad rattling. It is VERY loud. I figured it out after removing the strut and shacking the hub myself. I hit the pins with a hammer bending them enough to take the slack out and the noise has disappeared. I know this is late but I hope someone else will read this and help themselves.
Actually the rattle was coming from the strut. It started when I jacked up the car and it disappeared in a few days never to be heard again. BTW this car has drum rear brakes.

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