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Rebuild HT6 or Junkyard 1998 Chevy Blazer

givemore on Fri July 06, 2012 5:19 PM User is offline

Year: 1998
Make: Chevy
Model: Blazer
Engine Size: 4.3
Refrigerant Type: 134
Ambient Temp: 80
Pressure Low: 0
Pressure High: 0

Blazer has Belly Leakers and won't hold AC charge. Should I rebuild compressor or try to get one from pick your part place?

I get that this is not really a fair question, too many variables.

I already bought one compressor from Junk Yard but it too leaked. Unfortunately, I did not install soon enough to take advantage of the return policy.

Our JY in California has 50% off sales every month so a compressor is only $20 with a $5.00 core deposit. Unfortunately, these compressors for the Blazers, Chevy Pickup trucks and Suburbans are pretty well picked over. The one I did buy was a clean remanned unit from 4Seasons. Rotated well, pumped and sucked but leaked when installed.

The original Delphi's don't turn by hand so it is next to impossible to see if they are pumping and sucking at the junkyards so then it leaves me to just try to evaluate condition based on visuals.

Is there a better way to bench test or field test these before bringing them home? I really dislike installing and then having it leak and having to do over.

At least if I did my own R&R, I would know who to blame if it still leaked. Too bad the HT6 compressors for the Chevy Astro vans aren't on the "also fits" list. They look the same and there are LOTS of these vans in the junkyards.



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Thanks for your help!

mk378 on Fri July 06, 2012 6:05 PM User is offline

Take apart your leaky ones and see how badly they are corroded. Belly leaks occur because of corrosion from the outside, eventually the corrosion gets under the o-ring and you have a leak. GM Tech has a lot of experience with fixing them by resurfacing the metal and installing a new o-ring.

GM Tech on Fri July 06, 2012 7:32 PM User is offline

Buy the astro van pump and swap the pulleys......or reseal the one you have- buy the reseal kit online...

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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......

givemore on Fri July 06, 2012 7:48 PM User is offline

Both Great ideas. Since I already have the spare pump, I could do the whole thing offline at my convenience and not really worry about downtime on the car. Awesome Advice!

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Thanks for your help!

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