A/C redo questions

[Guest jcc3inc]

Good afternoon,

I getting ready to get the A/C back in operation on my 91; questions are:

1) Assuming I need a new compressor, <span style="font-style: italic">where to buy </span>recommendations please. I recall

earlier posts with comments on this, but they are now not accessible??

2) The system was "converted" to R134; how should I clean the system to be sure

that all the bases are covered?

3) Other tips/suggestions to ensure a good job.

Thanks in advance for your suggestions.

Regards to you all,

Jack C.

[Vincent Vega]

I'm going through the same thing with my 88.

I started this last year with a recharge and leak test.

Mechanic pulled vac for thirty mins and it held for thirty more.

Good to go right? No.

Diagnosis: Leaking compressor seals and evaporator.

My plan was simple. This summer I would:

Replace:

evaporator

Orifice

All seals

Accumulator

Compressor seals.

Leak test, recharge.

Mechanic pulled vac for thirty mins and it held for thirty more.

Good to go right? No.

No visible dye leaks with normal system pressures.

Charge with nitrogen(higher pressure)

Leak found in flex hose.

That's where I am. I am recharging with R12..

I have almost 300.00 into it so far.

Replacing most components is fairly easy. The exception being the evaporator.

Ackits.com has pretty good prices on all the components. I would suspect Jim Finn would have good used parts as well. There really are only 4 components that commonly fail, compressor, condensor, evaporator, accumulator. The other parts are hard lines, o-rings, orifice, and muffler/flexlines.

You should replace the accumulator and orifice if you are replacing the compressor. Replacing the o-rings is cheap and easy. The evaporator will most likely have a bunch of crud blocking the air flow. That's a bit tricky. The tech should flush the entire system.

Labor is the killer here.

Good luck.

[Guest neroco2]

Here's an interesting thing I learned about A/C yesterday. If you have a full charge in the system and the compressor still doesn't engage, do the wiggle. Seriously, anywhere there is an electrical connection (compressor clutch, pressure switch) wiggle the connector while your have the system turned on. I just did this to my 85 Corvette and the system came alive. I took the connector off, cleaned it and now I'm soooo cool.

I also did this with a malfunctioning charging system in a 69 Vette years ago. When I turned the headlights on the engine would miss. How neat is that? It was so bad I just stopped driving the car. Then one day, while I was looking things over with the lights on and the engine missing, I leaned on the altenator and the problem went away. T'was a bad connection.

neroco