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Sometimes You just Feel Like You Won One.....

GM Tech on Thu May 22, 2008 9:03 AM User is offline

Year: 2003
Make: GMC
Model: Envoy
Engine Size: 4.2L
Refrigerant Type: R-134A

This guy works with me- was in China when his wife throws the belt off their 2003 Envoy-- compressor was seized- slipping the clutch- His father puts on a new belt- unplugs the compressor- waits on my buddy to come home-- Sight unseen, I advise him to buy a used compressor (new Sanden Scrolls are $629- remans are $239) - got one from a salvage yard off a 2007- stepping up 4 yrs- clean as whistle-- put it on last night (3hrs labor) -tight quarters to work through- have to pull alternator and a few other obstacles- the old Sanden scroll had the fixed scroll walls broken out- a clean failure- no debris to speak of- makes me wonder is this common for the Sanden scrolls to fail in this manner? or is there an issue with liquid refrigerant slugging- the compressor did seize in cool weather- rainy- when owner turned on defrost- so to bust apart that fixed scroll walls- it took a pretty good hit-- Has anyone else had this type of failure???

The good news is he bought the pump with a lifetime warranty (extra $20) from a salvage yard for $125 plus $15 to UPS to his house next day delivery- and I put it on for only 3 hrs labor-- so he gets the entire job for about $240. He'll be buying me coffee for the next month.....

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

ice-n-tropics on Thu May 22, 2008 5:16 PM User is offline

Tim, got your ears on?
You can get a new Sanden scroll TRSA12 for a lot less.
Cordially,
Old IV/Frigette guy

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Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy.
AMAZON.com: How To Air Condition Your Hot Rod

TRB on Thu May 22, 2008 7:16 PM User is offlineView users profile

You mean this one.
20-03450

I keep saying all the time we have so much more then what is listed and I am just an email away if there is a question.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

Chick on Thu May 22, 2008 7:18 PM User is offlineView users profile

Hey GM Tech, did it look something like this one?? If so we get a few every summer from Honda Civics, to Dodge vans... So in my opinion, yes it's a common failure on scrolls to blow the sides out..


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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

GM Tech on Thu May 22, 2008 11:52 PM User is offline

It wasn't as bad as your photo- the fixed scroll inside was busted up pretty bad- but no external casting wall damage- I can't help but think liquid slugging is involved somehow--scroll should wear evenly and to severely break out walls would take an extreme force- such as is generated by trying to pump liquid refrigerant-- so I'll keep studying this failure mode- and welcome anymore evidence......

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Chick on Fri May 23, 2008 6:09 AM User is offlineView users profile

On the Honda civic the compressor is mounted low, on Dodge vans on top like an HT6, I get this failure from both. Usually it's a ball bearing came loose and got caught in there blowing the side out, or some other contamination. Most aren't that bad, and even this one looked complete until I got it out and the pieces fell away...

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

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