A/C compressor chirp?

likuidkewl · Post by **likuidkewl** » Mon Oct 16, 2006 8:46 am

All,
I have an '04 CC ZR5 with a "chirp". I found out through a little detective work, it only happens with the A/C, vent, Defroster, etc. in the on position at any fan speed. I had the shop look at the compressor, belt, and tensioner they said all were in fine operating condition and that there was nothing they could do about it.
So I thought I would see if anyone else has had/remedied this problem.

Thanks in advance!

Post by **Walt** » Mon Oct 16, 2006 8:49 am

Describe the chirp. Does it happen when the AC comes on, or turns off. Is it like a continuous squealing, or kinda like an alarm chirp?

likuidkewl · Post by **likuidkewl** » Mon Oct 16, 2006 8:55 am

At higher RPMs, such as right before it shifts (Automatic BTW) or right after.
But not while idling, it is a high pitched quick, less than a second "chirp".
It sounds almost like the tensioner is getting to taught when the RPMs get high.

Post by **Walt** » Mon Oct 16, 2006 9:16 am

Mine does that every now and then. I've never paid it much attention. It could be from a hard shift. Maybe the tranny shifting hard, and the belt slips slightly. That would be my guess.

likuidkewl · Post by **likuidkewl** » Mon Oct 16, 2006 11:32 am

That is my guess, but it happens all the time when the A/C compressor is on and it gets annoying because I know it is there, jut one of those things I guess.

But if anyone has a fix, besides turning off the compressor all the time

feel free to share...

Thanks..

Post by **Walt** » Mon Oct 16, 2006 11:37 am

Hmm....you got me on this one. Maybe Brule or Steve will chime in before long.

Post by **HenryJ** » Mon Oct 16, 2006 3:04 pm

I have the same sort of thing with a shift at high rpm. I think that a different belt may be the answer.
Steve suggested that his belt never does this. It may have been a "Gatorback" ?

likuidkewl · Post by **likuidkewl** » Mon Oct 16, 2006 5:15 pm

Thanks for the information, I may look into that.

killian96ss · Post by **killian96ss** » Tue Oct 17, 2006 8:46 am

HenryJ wrote:Steve suggested that his belt never does this. It may have been a "Gatorback" ?

I have a Goodyear Gatorback belt on all of my vehicles and they are much nicer than the stock belt.

They run quieter, transfer more power, and don't slip on the pulleys since they have "teeth" instead of smooth ridges.

IMHO, these are the best aftermarket belts made.

Dayco makes a similar belt called a poly-cog however they tend to make a little more noise due to the placement of the "teeth".

Steve

crew cab sonoma · Post by **crew cab sonoma** » Wed Oct 18, 2006 3:31 am

ive always noticed a slight "whine" from the Goodyear Gatorback belts, over conventional belts, at higher rpm. nothing annoying really.

and im not sure they have more grip, or not, since they dont have quite as much surface contact area with the pulley groves.

but they certainly are more flexible. not sure if that helps anything either, but it seems they could bend around small, alternator and idler pulleys more easily.

rickscrewcab · Post by **rickscrewcab** » Thu Sep 27, 2007 12:34 pm

I have the chirp sound also. I only hear it when I'm driving. It happens at different times and speeds. I will definitely check the a/c compressor next. It's funny, because I was just describing the sound to a friend today before I read this.

border man · Post by **border man** » Thu Sep 27, 2007 5:54 pm

I don't really know if this might be it, but if I keep my AC at the #1 setting, the compressor cycles on and off constantly, and it usually causes a chirp as the clutch engages.

rickscrewcab · Post by **rickscrewcab** » Thu Sep 27, 2007 6:03 pm

I played around with my a/c on the way home from work today, and I really think it is my a/c compressor. I drove with the a/c on until I heard the chirp start, then I shut it off and it stopped. Thank God winter is almost here. I guess a Gatorback is in order now.
Damn, I love this site!!!

BobbleSmitty · Post by **BobbleSmitty** » Mon Nov 12, 2007 5:22 pm

Which Gatorback belt (Part #) should I order if everything under the hood is stock (meaning I don't have any aftermarket accessories like a new alternator or anything else that would throw off the size).

Thanks

killian96ss · Post by **killian96ss** » Mon Nov 12, 2007 6:34 pm

BobbleSmitty wrote:Which Gatorback belt (Part #) should I order if everything under the hood is stock (meaning I don't have any aftermarket accessories like a new alternator or anything else that would throw off the size).

Thanks

I got mine from Summit Racing Part # GTR-4060950.

The belt is 6 rib with a 95" length.

Steve

BobbleSmitty · Post by **BobbleSmitty** » Wed Nov 14, 2007 3:47 pm

Thanks Steve! I bought one today at Murray's Autoparts for 29.99 and put it on. Took me 10 minutes to do it. All of the squeeling has gone away!! The real test will be tomorrow morning when I go into work, but as of right now, I think the noises are gone!!!!

BobbleSmitty · Post by **BobbleSmitty** » Thu Nov 15, 2007 3:11 pm

All is well with it! Went to and from work today and not a sound!

Noma02 · Post by **Noma02** » Fri Nov 16, 2007 6:20 am

Feel any increase in power?

killian96ss · Post by **killian96ss** » Fri Nov 16, 2007 12:16 pm

Noma02 wrote:Feel any increase in power?

A new belt will not increase power.

Steve

BobbleSmitty · Post by **BobbleSmitty** » Fri Nov 16, 2007 3:13 pm

No increase in power, but big time noise reduction!!

Noma02 · Post by **Noma02** » Mon Nov 19, 2007 6:34 am

That will have to be the next thing I do!