I took my 02 TB to the mechanic for a grinding noise coming from the compressor, mechanic said it was the AC clutch assembly. My question is is it worth it to only replace the assembly? The mechanic said that if the assembly is bad there is a 90% chance the compressor is bad to but the AC worked fine the only problem was the noise any ideas on what I should do?
Replace compressor clutch or whole compressor?
- Thread starter Djordan2
- Start date
A few folks here have changed just the clutch or the bearing where it sits, and retained the original compressor. A quick search should find those threads for you, with pictures. Depends on what you can buy a full compressor for and what the mechanic charges to evacuate the system, replace it, and recharge it accurately.
Sparky
Member
- Dec 4, 2011
- 12,927
You cannot buy just the clutch and pulley, as stupid as that sounds. It is "all one piece" according to GM and no one has made replacement pulleys that I could find for some dumb reason. You can however find the pulley bearing from places like ebay. It is just a "generic" bearing so you have to get the right size. I forget what the proper dimensions are, I'll have to see if I can look it up.
However, something to be aware of as you may run into the same thing I did:
I got mine all apart and found that the pulley and clutch itself had worn down quite a lot. There was no removing the old bearing without breaking the pulley as the metal was really thin. I ended up going to a junkyard, buying a whole used compressor, and raiding it for the pulley and clutch plate. Then I swapped the bearing out on that one (didn't want to have to take it all apart again later), and put that pulley and clutch on my existing AC compressor. I have a spare compressor now if I ever need it, but my issue was simply the pulley bearing making a racket.
Be aware, it wasn't easy getting to the thing. You have to take off the fan clutch from the water pump and remove the radiator shroud and fan to get enough room. Basically had the front end of the truck disassembled to get to the darn thing
If you don't mind doing stuff like that yourself, have at it. You can save a lot. But if you have to pay a mechanic to take it all apart to fix it, the added cost of replacing the compressor might not be that much more by that point. What would he charge to replace just the pulley vs the whole thing?
However, something to be aware of as you may run into the same thing I did:
I got mine all apart and found that the pulley and clutch itself had worn down quite a lot. There was no removing the old bearing without breaking the pulley as the metal was really thin. I ended up going to a junkyard, buying a whole used compressor, and raiding it for the pulley and clutch plate. Then I swapped the bearing out on that one (didn't want to have to take it all apart again later), and put that pulley and clutch on my existing AC compressor. I have a spare compressor now if I ever need it, but my issue was simply the pulley bearing making a racket.
Be aware, it wasn't easy getting to the thing. You have to take off the fan clutch from the water pump and remove the radiator shroud and fan to get enough room. Basically had the front end of the truck disassembled to get to the darn thing
If you don't mind doing stuff like that yourself, have at it. You can save a lot. But if you have to pay a mechanic to take it all apart to fix it, the added cost of replacing the compressor might not be that much more by that point. What would he charge to replace just the pulley vs the whole thing?
He wanted 800 to do the entire compressor with a used 100 dollar junkyard compressor and 400 to replace the clutch, but I do have the clutch and pulley (advance auto)
Sorry it's auto zone but here is the link to the part I got http://m.autozone.com/autozone-mobi...t-Trailblazer-4WD/_/N-jg9c5Z91sgk?switch=true
Djordan2 said:
Got the following results:
We're sorry, but there are no results in this parts category for 2005 GMC Truck Envoy 4WD 4.2L SFI DOHC 6cyl.
Sparky
Member
- Dec 4, 2011
- 12,927
Yes.
To replace the compressor you have to tear apart the same stuff as just doing the clutch, plus then you have to empty the AC system, replace the compressor and the drier, pull a vacuum, recharge the system, etc... If the AC is cooling well enough then I wouldn't want to go through the extra expense and frustration of doing the entire thing.
I still have the original compressor on my 2002 (with a replacement clutch), 180k miles, still works just fine.
If you were closer I'd help you out since I've done it before.
To replace the compressor you have to tear apart the same stuff as just doing the clutch, plus then you have to empty the AC system, replace the compressor and the drier, pull a vacuum, recharge the system, etc... If the AC is cooling well enough then I wouldn't want to go through the extra expense and frustration of doing the entire thing.
I still have the original compressor on my 2002 (with a replacement clutch), 180k miles, still works just fine.
If you were closer I'd help you out since I've done it before.
That Would have been awesome. However, I called a Local Scrapyard and got a compressor off a 2006 TB for $100 and found a local mechanic that does some work for my Fire Department and he said he would replace the compressor and gas it back up for $150 so $250 for the compressor and the Labor. That route seems just as cheap as replacing the Clutch. Might go this route any Concerns I might need to look for?Sparky said:
He did say he would replace the drier and the orifice tube as well. The O-rings i'm not sure about.
triz
Member
- Apr 22, 2013
- 746
I may or may not have a set of compressor O-rings laying around. Try Advance Auto and see what they quote you for a new compressor. I recall being in a bind one time and bought a Tough One Ac Compressor for 187.00 New. I'd have to dig out the receipt. But I would go new if you can get a decent price on one.
Just picked up the TB from the mechanic. Mechanic said it was a routine compressor replacement with no issues and the system looked very clean. He also said the other compressor worked very well it just needed a clutch. Air works fine so far seems pretty cool, maybe not as cool when the vehicle is idling but I plan on calling him tomorrow about that. He even let me keep the old compressor..lol View attachment 28843
Here she is fresh out the shop a little dirty need to wash her!!!!
Here she is fresh out the shop a little dirty need to wash her!!!!
Attachments
meerschm
Member
- Aug 26, 2012
- 1,079
Used Auto Parts | Used Car Parts | Auto Salvage
has a couple used compressors listed for around $85 in Toledo. you could pull the clutch.
Did Air Parts give you an estimate when they would have rebuilt clutch in stock? could just be the start of the busy season.
has a couple used compressors listed for around $85 in Toledo. you could pull the clutch.
Did Air Parts give you an estimate when they would have rebuilt clutch in stock? could just be the start of the busy season.
No they didn't. I guess I should ask for one. Then again I'm not sure that's what's wrong with my ac. I need the proper gap measurements and then I can go from there.meerschm;145424 said:
Sparky
Member
- Dec 4, 2011
- 12,927
jme2712 said:
I think so. There should be little to no difference in the engine and attached accessories between the Chevy and the GMC.
meerschm's idea would work however, that's the route I took, although you'd still have a used pulley bearing with unknown life left.
Found the bearing I used on mine, it is a 35x50x20 mm bearing
New AC Compressor Pulley Clutch Bearing 35BG05S7GD 35mm 50mm 20mm 35x50x20 | eBay
My A/C clutch engages for a few seconds every minute , wich makes the rpm drop to 550 everytime , on or off .
Did I need to check the the compressor and clutch or there is other issues like a leak or a sensor to check ?
A/C is not so cold too.
Did I need to check the the compressor and clutch or there is other issues like a leak or a sensor to check ?
A/C is not so cold too.