98deville Posted April 21, 2008 Report Share Posted April 21, 2008 I have a 98 deville with 112k miles on it, have not changed any belts on it at all. I'm also hearing a strange, well it sounds like a chirping sound and seems to get faster as I step on the gas. It's coming from where all the pulley's are and I think that one of the pulley's might be a little loose cuase when the car is on I can see the pulley to the left of the a/c comp. wobbling. Could that pulley be cuasing that noise or is it the belts? Link to comment Share on other sites More sharing options...
BodybyFisher Posted April 22, 2008 Report Share Posted April 22, 2008 Are you speaking about the crank pulley wobbling (#5)? Mine wobbles a little, but I don't think that is your chirping. At your mileage, the tensioner pulley, idler pulley could need replacing. You can remove the serp belt, and turn each component and feel for roughness or looseness or dry bearings. Sometimes the tensioner binds or looses its ability to apply tension to the belt and it chirps. How is your AC?, the pulley hub bearing tends to go. When does it chirp, constantly or when the ac engages or on acceleration? Here is a photo of the accessories and wheels on that side of the engine Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
steve6 Posted April 22, 2008 Report Share Posted April 22, 2008 Not sure how the pully is on that car (solid metal etc), but I have seen cars where there is rubber on the harmonic balancer, like between the metal part where the belt rides and the mounting, and over time it starts to seperate and creates chirping noises as it turns etc.... just something to keep in mind. Link to comment Share on other sites More sharing options...
BodybyFisher Posted April 22, 2008 Report Share Posted April 22, 2008 By the way, one other possibility, I have seen the AC clutch chirp on engagement also. The guru used to use a length of 3/4" hose as a listening device, put one end at your ear and listen to the components with it, BE CAREFUL not to get tangled up with the serp belt. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
lothos Posted April 22, 2008 Report Share Posted April 22, 2008 By the way, one other possibility, I have seen the AC clutch chirp on engagement also. The guru used to use a length of 3/4" hose as a listening device, put one end at your ear and listen to the components with it, BE CAREFUL not to get tangled up with the serp belt. I've also heard that a socket extension works as well. Put your ear to the hollow end and the other end against what you want to listen to. Not sure which works better. WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
BodybyFisher Posted April 22, 2008 Report Share Posted April 22, 2008 By the way, one other possibility, I have seen the AC clutch chirp on engagement also. The guru used to use a length of 3/4" hose as a listening device, put one end at your ear and listen to the components with it, BE CAREFUL not to get tangled up with the serp belt. I've also heard that a socket extension works as well. Put your ear to the hollow end and the other end against what you want to listen to. Not sure which works better. This is true also, my Dad showed me that when I was a kid. Putting the extension near moving parts can be dangerous however, and I like the guru's method with the hose, which can also be dangerous if you are not careful. As an example, if you wanted to listen to your alternator, getting the hose down there is tricky.. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
jlinde Posted April 22, 2008 Report Share Posted April 22, 2008 One thing that can chirp is the belt itself - one time I was totally convinced that I had a faulty power steering pump - bought a new one and changed it - same sound. Then I replaced the serpentine belt and the chirping was gone. The chirping belt did not have the cloth look on the ribbed surface. /Jan L. Link to comment Share on other sites More sharing options...
BodybyFisher Posted April 22, 2008 Report Share Posted April 22, 2008 One thing that can chirp is the belt itself - one time I was totally convinced that I had a faulty power steering pump - bought a new one and changed it - same sound. Then I replaced the serpentine belt and the chirping was gone. The chirping belt did not have the cloth look on the ribbed surface. /Jan L. This is true and really the first thing that should be looked at, a dry, shiny, cracked belt can definately cause problems. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
98deville Posted April 23, 2008 Author Report Share Posted April 23, 2008 yea it's the #5 pulley that wobbles ...I'll change all the belts and see if the noise goes away Link to comment Share on other sites More sharing options...
98deville Posted April 24, 2008 Author Report Share Posted April 24, 2008 Changed belt and chirping gone....Payed $45 for a Gates belt at O'rielly's which I thought was too expensive so I look on Rockauto.com and ordered one for $32......Or should I have gone with a Ac Delco belt? Link to comment Share on other sites More sharing options...
BodybyFisher Posted April 24, 2008 Report Share Posted April 24, 2008 Changed belt and chirping gone....Payed $45 for a Gates belt at O'rielly's which I thought was too expensive so I look on Rockauto.com and ordered one for $32......Or should I have gone with a Ac Delco belt? This is the belt that I like, pay whatever it costs, I REALLY like it.. http://www.goodyearbeltsandhose.ca/replace...rbackpolyv.html Did I say that I liked it? I have had one for 3 years and it looks new Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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