Automotive Air Conditioning Information Forum (Archives)

Provided by

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

HT-6 issues?

D.T. on Thu July 17, 2008 8:12 AM User is offline

Year: 1997
Make: GMC
Engine Size: 4.3
Refrigerant Type: 134a

I bought a used HT6 compressor and of course it leaks also. Around the body.

I was looking on Ebay and seen this about another substitute compressor:

"Had the dreaded and common body leak on your compressor? Not with this one! The original GM HT6 had no internal pins or anything to keep the compressor from 'twisting', which is the main cause of most of the leaks. This unit is pinned at every seam, and will not leak."

I am going to try to avoid getting a Delphi compressor since I have had 2 leak on me already. Is this common knowledge and I'm learning the hard way?

If so, consider yourselves warned!

Too many questions, not enough answers....

GM Tech on Thu July 17, 2008 8:32 AM User is offline

Funny how the "experts" say it is the rotation that causes the leaks- when every one of these I work on- I take apart and sand down all the sealing surfaces- and replace the o-rings -- the leaks are due to corrosion, not twisting- in every case there is aluminum corrosion that crawls up under the o-rings and allows the leaks- if twisting was the culprit- none of these thousands of compressor would have ever made it out of warranty!

I am confident this is the case because even the ear mounted units do this- the ones on the bottom of older Caddys and C/H cars etc- they have the same issues and are not mounted in a way in which they can twist either-- but they still leak at the bellys-- the trucks are just much easier to see- the cars, you have to be under them to see the belly leakers--I have been re-sealing all H-6 series compressors for two years now and never had a comeback-- I figure after about 10 more years service, the corrosion will once more cause the leak- but usually that is all the customer wants..

Pins or not- if the compressor is not painted, the corrosion will eventually "get you" - I have been doing this work for 20 yrs and can't remember this problem back when we were allowed to paint compressors..

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......

D.T. on Thu July 17, 2008 8:50 AM User is offline

Can I send one of my paper weights to you for a rebuild? How much? Are they hard to rebuild yourself? I'd give it a try. What oil is best for them?

I agree about the aluminum corrosion also. Point-Counterpoint. Oxidation causes the o-rings to leak. Anodizing the aluminum would help. Clear coat a new unit?

Too many questions, not enough answers....

Edited: Thu July 17, 2008 at 8:53 AM by D.T.

MoneyShot on Wed August 20, 2008 11:22 AM User is offline

I have an HT6 compressor and I want to re-seal it, but I'm a little skeptical of buying the kit at advance and I've read the delphi compressors have a couple different clutches on them. Is this true? And is there anywhere else I can find the kit?

Chick on Thu August 21, 2008 10:37 PM User is offlineView users profile

A lot less work, and cheaper in the long run if you've never taken a compressor apart would be to replace it with a sanden or seltec clone from I have been using the Seltec for two years now, and not a spot of oil leaking..Great compressors, and you won't be dissapointed... Hope this helps..

PS: Gm tech does them all the time, but he does them all the time... if you know what I mean...

Email: Chick


Freedoms just another word for nothing left to lose

Back to Automotive Air Conditioning Forum

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.