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Old 06-25-2008, 11:02 PM   #1
pierangler
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1993 SL2
Default 93 SL2 Loud Rattling Sound and Vibration

My 93 SL2 (140,000 miles on it) has begun making a loud rattling sound and a vibration that seems to be coming from beneath the passenger side floor. It does not make it when the engine is idling - only when the engine is accellerating. I believe that it may be coming from the catalytic converter. When I hit it with my fist, I can hear something rattling around inside of it. Could this be my problem? How hard is it to replace? How much would it cost?

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Old 06-26-2008, 12:23 AM   #2
LeeWee76
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2000 SC
Default Re: 93 SL2 Loud Rattling Sound and Vibration

Have you listened to your exhaust while raising the idle? My Catalytic Converter was making a similar noise. I replaced it and the noise stopped.

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Old 06-26-2008, 10:37 AM   #3
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1996 SW2
Default Re: 93 SL2 Loud Rattling Sound and Vibration

Also look at the muffler strap; if it has failed, the exhaust will be sitting on the rear suspension cross-member, and will make a lot of rattling noise from approximately the location you report.

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Old 06-30-2008, 12:30 AM   #4
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1993 SL2
Default Re: 93 SL2 Loud Rattling Sound and Vibration

I checked the muffler for loose straps and the heat shield. They seemed to be OK and secure. I did take a look at the upper motor mount and found it to be severely worn. There was no rubber cushion left in the mount. So, I think that may be the source of the noise and vibration. I'll have to search the site to learn how to replace it.

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Old 07-20-2008, 12:05 AM   #5
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1993 SL2
Default Re: 93 SL2 Loud Rattling Sound and Vibration

I ended up replacing the top motor mount. I was able to stick my hand through the mount - that was the source of all of the noise and vibration. I bought the motor mount off of eBay for $20 plus $10 shipping and it was a perfect fit - it took me about 20 minutes to do the job. Rich Pin's You Tube video was a great help. So, all is well with my Saturn again. Thanks everyone for their help.

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