2nd Gen Non-Engine/Transmission A/C compressor rebuild kit?

[NGuzik]

Long story short: Can an A/C compressor with low compression be rebuilt?

Just so everyone is on the same page, to start my A/C system is leak free. I removed all the air from the system and started to pump freon in. I got the correct amount of pump oil in (6. 4oz if I remember correct) and started to put a can of freon in but ran in to a few odd things.

1) Both the high and low side had the same size port for the gauges so I can only monitor one side at a time.

2) I started to add to the low side line and started to get crazy pressures (around 100psi) after the compressor was running.

3) I also had just a little more pressure on the high side (around 160psi) also after the compressor was running.

4) The compressor will kick on for a 10 seconds and turn off for 10 seconds with the rpms at 1500.

So heres where I'm at, new condenser, new high and low side lines, new dryer, new pressure cycle switch, and all new seals on every thing. The only thing I haven't replaced is the compressor. I had high hopes that I wouldn't have to replace it because it kicked on and seemed to be cycling at a regular rate. I've come to the conclusion that my compressor must not be completely compressing the freon. I searched around for a compressor rebuild and had no luck. I really don't want to replace my oem with a sloppy remain part for a quick fix and don't have $1500 for the new oem the dealer quoted me. Anyone know aside from special tool if I'll be able to rebuild my compressor? Maybe a few part number? The truck is a 1994 and is r134a system. Any help would be awesome, cheers nick

 

[Cosmo]

If you replaced the lines and you have two low side ports? Or does your manifold set have two low side hoses? That makes no sense.

Do you have an A/C machine? How are you evacuating the system?

 

[Joseph Donnelly]

It doesn't seem that your problem is really (or only) the compressor. You should be able to buy a new compressor from Amazon, or Rock Auto. I found the former to be cheaper but both are a lot less than you quoted. Remember you have to put AC on high, recirc, and open windows, etc. so the compressor doesn't keep cycling on and off. For some years and models of compressor, you can get a clutch kit, but if the compressor is bad, replace the entire thing.

 

[NGuzik]

Both the high and low said have the same size port, so to read both at the same time I would need another larger adaptor to read both at once. I don't have a pro level a/c machine but I do have the gauge set and use a reverse air pump to suck down the air before freon is put in. I just let it run plugged in to the system for a good hour and check to make sure the a/c system was holding vacume pressure. It seems to me that one or more of the cylinders must be loosing pressure. I just wasn't sure if there was a piston ring or anything that could go bad or if one of the main seal gaskets could be bad. I only ask this because the system hasn't been used in many years and wounded if it could act like a motor after sitting for a long time. But unfortunately I also think the aluminum block could just be to far worn out of spect and would require a new bore and piston to be put in. Thanks for the input. .