Strange chirp sound. Now with a video. FINALLY FIXED! - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-16-2008, 01:43 PM   #21
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Quote:
Originally Posted by willwren
Series 1 cars (L27 and L67) don't have a belt through the mount. Only Series 2 96-99.
Thats what i thought bill, thanks for the clarification! been a while since i dealt with SI
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Old 03-16-2008, 10:11 PM   #22
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OK, today i spent some time checking it out. It was a little warmer today and isn't doing it as bad. BUT, I drove into a car wash because the lighting is much better (I've been checking it at dark with a flash light because that'* when it'* colder and happens more) but NOT FOR THE LIFE OF ME could I get the noise to continue when I was pulled into the wash bay. When I put it in reverse it would squeal as i hit the brakes but when I put it into park it would quit. Took it for a drive down the highway to get it going again, pulled back into the car wash bay. Same thing, it wouldn't squeal in park!

So I left and stopped at the gas station for a soda. The car was parked on an incline with the front facing slightly down hill. NOW it keeps squealing in park!!!

Anyway I took lots of time to check it out this time. Now i have to admit it DOES appear to be coming from the serpentine belt area but down low so that it made it sound like it was coming from somewhere else. The pully that is down low in the front of the engine is what I suspect the air condition compressor? Is this true? I don't know if the compressor is bad but the belt is very old and has lots of dry rot. Maybe this is just a case of a bad serpentine belt? Do any of you think the compressor may be starting to freeze up to cause the squealing or might it just be squealing because the belt is worn out and the compressor takes some force to turn it?

The noise does appear to be coming from that pully. Any suggestions beyond buying a new belt? Or are you all pretty confident that it may just be an old wore out belt? (for all I know the belt is the factory original, I know the plug wires were )
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Old 03-16-2008, 10:29 PM   #23
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First, check your trans fluid for level, color, and smell.

Second, spray a little WD-40 in between the compressor and pulley on the AC. WD-40 isn't a lubricant (it'* a water displacing solvent, hence the name), but it can give you a short-term indicator of a problem.

Your AC compressor clutch may be the problem. Be careful NOT to get any WD on the belt just yet, so we can rule out one thing at a time. That may come later.
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Old 03-16-2008, 11:06 PM   #24
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Quote:
Originally Posted by willwren
First, check your trans fluid for level, color, and smell.

Second, spray a little WD-40 in between the compressor and pulley on the AC. WD-40 isn't a lubricant (it'* a water displacing solvent, hence the name), but it can give you a short-term indicator of a problem.

Your AC compressor clutch may be the problem. Be careful NOT to get any WD on the belt just yet, so we can rule out one thing at a time. That may come later.
I checks the trans fluid today and it was full and i didn't notice any different oder or color. It seemed ok. but I didn't hold it up to my nose to smell it. As far a color it seemed decent. Redish and didn't appear burned. I do have to admit the trans has been shifting funny while going into overdrive recently but it hasn't been do so for as long as the noise has been happening.

As far as the wd 40, where exactly do you recomend I spray it. Right in front of the compressor but behind the pulley? Should I aim for it to get into the compressor there or just on the shaft?
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Old 03-16-2008, 11:19 PM   #25
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The face and the back of the pulley, but not on the pulley itself.
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Old 03-16-2008, 11:25 PM   #26
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Quote:
Originally Posted by willwren
The face and the back of the pulley, but not on the pulley itself.
OK, I'll run out and give it a try and be back to the boards in a little bit.
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Old 03-16-2008, 11:50 PM   #27
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Quote:
Originally Posted by willwren
The face and the back of the pulley, but not on the pulley itself.
OK, I just tried that. I spray liberally on the face and behind the pulley but it'* still doing it. Two things I am starting to notice is if the car is sitting level when I come to a stop the noise quits. but if I am on a hill with the front of the car facing downhill at a stop, it keeps sqealing. Also, when I shut of the car after it is warmed up, it makes a sound for a minute or so that I would relate to a bird chirping. haha
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Old 03-17-2008, 12:54 AM   #28
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Start thinking fluid levels. PS or trans.
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Old 03-17-2008, 12:59 AM   #29
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Quote:
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Start thinking fluid levels. PS or trans.
Yes, trans and power steering fluids are full.

I just can't figure out why it seems to get worse will applying the brakes or while sitting on an incline (or decline as it is)
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Old 03-17-2008, 01:02 AM   #30
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Incline and decline are easy. Think about it. Fluid level.

Brakes affect vacuum level. You sure it'* not a whistling vacuum leak?
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