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Thread: Solved What I thought was an exhaust rattle

  1. #1
    2dfx's Avatar
    2dfx is offline Cadillac Owners Fanatic
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    Thumbs up Solved What I thought was an exhaust rattle

    Over the past year i've had to deal with a rattle and vibration that sounded like a loose emissions component, but never bothered to take it in. I did today and was interested to find out what was wrong:

    Turns out it was 2 problems. One a result of neglecting the other unfortunately.

    1st problem was the belt tensioner was seized and it had glazed the belt. Got the tensioner replaced along with the belt but the sound was there. Mind you it was better, but not gone.

    Alas the bad tensioner took a toll on the A/C Compressor. The noise is actually the bearing in the compressor. I was pretty pissed but also offered 3 cost options, all in CDN funds:

    -Replace the bearing for $300
    -Replace the whole AC clutch $400
    -Replace the whole compressor $900

    I'm going to go with the middle option and replace the AC clutch. At least that way the noise is eliminated and being that shes still on the original compressor (1994) i'm going to chance it with the life span shortage.


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  3. #2
    Stoneage_Caddy's Avatar
    Stoneage_Caddy is offline Cadillac Owners 10000+ Posts
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    Re: Solved What I thought was an exhaust rattle

    the tensioner seized???????

    hmm , guess i beatter get mine done , its getting noisy , did you check the ilder pulley too , thats where my noise is coming from but its not seized yet

  4. #3
    2dfx's Avatar
    2dfx is offline Cadillac Owners Fanatic
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    Re: Solved What I thought was an exhaust rattle

    Quote Originally Posted by Stoneage_Caddy
    the tensioner seized???????

    hmm , guess i beatter get mine done , its getting noisy , did you check the ilder pulley too , thats where my noise is coming from but its not seized yet
    You got it. When you retracted the tensioner it would stay in that position rather than spring back. Without this the belt cannot be properly tensioned under shifts in the belt's movement. The tensioner pulley was a little sticky too.

  5. #4
    Stoneage_Caddy's Avatar
    Stoneage_Caddy is offline Cadillac Owners 10000+ Posts
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    Re: Solved What I thought was an exhaust rattle

    never seen a tensioner seize up like that before i ususly see the pulley on the end of it seize up from bearing failure but never the tensioner side ...wierd

  6. #5
    JNHEscher is offline Cadillac Owners Member
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    Re: Solved What I thought was an exhaust rattle

    Was this a consistant rattle or did it start after medium acceleration? I have a '95 Deville that has a nasty rattle but only if the engine is hot and the vehicle is in motion. It's definately coming from the engine but I can't find it.

  7. #6
    HUF's Avatar
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    Re: Solved What I thought was an exhaust rattle

    Quote Originally Posted by 2dfx View Post
    Over the past year i've had to deal with a rattle and vibration that sounded like a loose emissions component, but never bothered to take it in. I did today and was interested to find out what was wrong:

    Turns out it was 2 problems. One a result of neglecting the other unfortunately.

    1st problem was the belt tensioner was seized and it had glazed the belt. Got the tensioner replaced along with the belt but the sound was there. Mind you it was better, but not gone.

    Alas the bad tensioner took a toll on the A/C Compressor. The noise is actually the bearing in the compressor. I was pretty pissed but also offered 3 cost options, all in CDN funds:

    -Replace the bearing for $300
    -Replace the whole AC clutch $400
    -Replace the whole compressor $900

    I'm going to go with the middle option and replace the AC clutch. At least that way the noise is eliminated and being that shes still on the original compressor (1994) i'm going to chance it with the life span shortage.
    You can bypass the AC with a shorter belt. I have got the part numbers.


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