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HT6 information request

neverong on Fri May 28, 2010 7:13 PM User is offlineView users profile

Year: 2000
Make: Chevy
Model: 2500 Express Van
Engine Size: 4.3
Refrigerant Type: R134a
Ambient Temp: 75 F
Pressure Low: 0
Pressure High: 0
Country of Origin: United States

Greetings,
I am a novice retrofitting my 2000 Chevy van with a completely new CCOT type A/C system. It's going quite well so far. Installed now are brand new condenser,orifice tube, evaporator, accumulator, and used but flushed hoses. My compressor is a used Delco HT6 I picked up at a salvage yard. Also used is the new mode controls. $650.00 in parts so far.
My main concern is about the compressor. What type of pump is an HT6 and how do I lubricate it correctly? I have already added 3oz of PAG 100 to the evaporator and 1 oz of the same to the accumulator. This was before I found your very handy capacities schedule which calls for 8oz total of PAG 150. Is 4 oz of PAG 100 and 4 oz of PAG 150 gonna kill me? How much oil goes into my now empty HT6? How much in my condenser?
The existing wiring and vacuum lines plug right in to everything. But will my VCM know what to do? It's never seen Air Conditioning before. And lastly, for now anyways, I bought four 12 oz cans of R134a refrigerant for almost fifty bucks. Was that a bad move for a DIYer? I only need 48 ozs if nothing leaks. I do have gauges and have evacuated and charged a couple of systems before but I will probably search your forum for the exact procedure.
Any input at all is greatly appreciated.
Jack

bohica2xo on Sat May 29, 2010 2:27 PM User is offline

So, basically you have removed an A/C system from a 2000 my van like yours & are in the process of installing it in your van that was not ordered with A/C.

The parts sound like they fit. The used compressor is going to be the only iffy part. HT6's are known to be leakers - search "belly leaker" on these forums. ANY used A/C compressor is a gamble. You can improve the odds by flushing a used compressor with fresh oil, and watching what comes out. A vacuum test on the bench can spot gross leaks before you install it.

Oil. Once you have a dry system, add the specified oil charge. As for mixing 100 & 150, I can't really say. I would use the 100 to flush the compressor, and buy the right oil. If the PAG you have on hand is not DEC, then use it all for compressor flush & buy fresh DEC PAG for the system. The oil can be added to the compressor inlet, before you close up the system. If you can't get it all in the compressor, put the balance in the dryer.

The PCM should deal with the A/C just fine. It may take a couple of cold starts to settle in on idle parameters. The PCM is an adaptive control.

B.

-------------------------
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

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