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Cadillac STS 1999
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2 Posts
Discussion Starter #1
Hello, this is my first post here. I bought a 1999 STS a few months ago and i absolutely love it. Its a very unusual car here in Sweden where I live wich makes it extra fun to own :thumbsup:

Pictures!
http://picasaweb.google.com/daphil/Blandat/photo#5075655171007370178
http://picasaweb.google.com/daphil/Blandat/photo#5075655149532533666

Anyway recently the car has been making a squeeking noise once or twice per minute while the A/C is on accompanied by a slight drop in performance for a short moment like 1 second max. Everything is working as it should but im wondering if this is something that could develop into something bad for my dear car and needs to be looked at.

Oh and im also wondering how long i can wait changing the break pads after the warning comes on, its been on for 3-4 weeks now but i havent had the time to service it.

Thanks for any replies.
 

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1999 Seville STS
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37 Posts
I have the same issue, also a 1999 STS, in Finland BTW. Extremely rare ride over here, maybe even more so than Sweden :)

http://sts.jpproduction.fi/k.jpg

The noise is kind of a short squeek or click about every 2 minutes whenever the AC is running. I am suspecting that the noise occurs whenever the compressor magnetic clutch engages. In that case, I would think that it's not that serious, the clutch prolly gets noisier with age. But I'm planning to ask the local dealer anyway.
 

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Super Moderator
2010 DTS
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87,559 Posts
Sounds like that noise might be associated with the clutch engagement like jtpaajan said. My guess is that perhaps your belt tensioner has frozen (rusted) at the pivot point and is not providing enough tension, thus every time the clutch engages, the belt slips and chirps. The other possibility is that the belt has stretched beyond the tensioners adjustment limit. I believe there are range markings on it somewhere.

As far as the brakes go, I would think you could get several thousand miles out of them after the warning comes on, depending on how you drive of coarse, but why wait that long.
 

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1999 Seville STS
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37 Posts
Thanks for the info, Ranger! That explanation is highly plausible - it's exactly what it sounds like, belt slipping momentarily. I checked out the belt and it's a bit loose and the rubber is slightly hardened - gotta have that thing changed asap.
 
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