A/C Noise

[jordankreutzer]

Hey Everyone,

It's been quite a while since I have posted on here but I have been busy at college! Now that I'm done with that, I'm hoping to give some much needed care to the Yukon that has been neglected for the last few years.

I should start by saying I have a 2001 Yukon with 5.3L and 150,000 miles. Unfortunately, I have discovered a strange noise coming from under the hood. I would describe it as a squeal. Its only present when the A/C is turned on (I know its an A/C problem just not what specifically) and only when the engine revs around 2k. The A/C still cools fine and I don't see any noticeable wear to the belt or idler. I am just hoping someone can tell me its something minor and not the compressor.

Thanks Everyone!

 

[BLKTah02]

Hey Everyone,

It's been quite a while since I have posted on here but I have been busy at college! Now that I'm done with that, I'm hoping to give some much needed care to the Yukon that has been neglected for the last few years.

I should start by saying I have a 2001 Yukon with 5.3L and 150,000 miles. Unfortunately, I have discovered a strange noise coming from under the hood. I would describe it as a squeal. Its only present when the A/C is turned on (I know its an A/C problem just not what specifically) and only when the engine revs around 2k. The A/C still cools fine and I don't see any noticeable wear to the belt or idler. I am just hoping someone can tell me its something minor and not the compressor.

Thanks Everyone!

I have the same problem especially when it first starts up, and sometimes while driving

 

[mcquack2]

I also have this same problem. That's my number 1 issue right now that I'm looking into.

 

[Ta_hoe]

Sounds like compressor.... wich really isnt major, but not minor also. I just completed my compressor swap because of the very thing you describe. Mine blew ICE cold too.

 

[SnowBuck]

wah wah

Mine is more of a wah wah wah sound on the passenger side engine compartment...and also blows ice cold (????). Sounds like the engine room of a sub or something ?!?!?!? I hear it in the car (2005 XL/SLT) but can't pin point it with the hood open (?!?).

 

[jordankreutzer]

I would agree the sound I have isn't really a squeak. A "wah wah" sound does describe it better. I guess when ever I hear the noise, I picture a belt being wrapped up in the fan or something. Now, there is no damage to my belts (yet) but thats kind of what the noise makes me think of. I am beginning to wonder if the A/C clutch is the problem and not the whole compressor since it does still blow cold air (crossing fingers). Does anyone know a good way to diagnose this?

 

[PUGLIA]

Sounds like the clutch is starting to lock up.


-----PUGLIA-----

 

[Tahoebigdog03]

I'm in this boat also it's either the clutch or compressor going out.

 

[imi4tth3w]

probably the clutch on the compressor. can be changed out separately but most people just replace the entire compressor. you'll pretty much need an entire a/c tune up since you will be exposing the a/c lines.

 

[bldn10]

Old thread but maybe someone will pick it up.

On the 4th day w/ my "new" '02 Tahoe the A/C belt broke. It did not look worn - it looked ripped fairly cleanly. I put a new belt on and it cools fine. However, when I accelerate I hear a sound that to me is more like when we were kids and clothes pinned cards to our bicycles to sound like motorcycles. It stops when I back off the gas. Drove home yesterday taking it real soft on the accelerator and never heard it. I'm thinking compressor clutch.

 

[Rivieraracing]

Thats what mine was doing a few weeks back, worked awesome but would make a god aweful noise at around 1000 to 1500 rpm range like a sprinkler and a chattering noise when it would flip out. Was able to duplicate it parked in the driveway while soneone stepped on the gas and saw it making the tensioner completely trip out ( changed out tensioner but that didn't make the noise go away. Ended up changing out the compressor and some other items and all is good now!

 

[bldn10]

I noticed yesterday that the noise would start right at 1500 rpm. I stopped at the shop I use and a mechanic watched while I gave it gas - tensioner also going nuts. He said that might fix it so I got a new and removed the old one. It looked like crap - the metal casing was cracked and the spring visible - so I just knew that was what it was. Nope - still does it. Can I go w/ a reman compressor?

 

[Rivieraracing]

Yeah, I was hoping it was the tensioner as well that's why I tried that at first but it did no good! I don't see a problem with a reman compressor but I like brand new parts personally whenever I can!