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Retrofit 81 Ford Granada

tony1963 on Thu July 23, 2009 7:03 PM User is offline

Year: 1981
Make: Ford
Model: Granada GL
Engine Size: 3.3L
Refrigerant Type: R12
Country of Origin: United States

I am planning to retrofit the AC on my 81 Ford Granada. It has a strange AC system, a huge York compressor and what appears to be an expansion valve and some kind of canister just beyond the expansion valve on the low side coming back to the compressor.

I'm planning to flush the system but as I understand it, the system is dry because the oil is in the compressor sump. The system works good on R12 but I dont' want to be caught without a working AC system and I have never used R12 after a system overhaul.

My questions are:

1.) What kind of oil should I use in the compressor? I assume that I'll drain out whatever is there and refill to the plug on the side of the sump?

2.) I will, of course, install a new drier fit for R134a along with new O-rings. Should the expansion valve be changed and where in the world do you get one for this car?

3.) What is the canister on the low side just after the expansion valve that is part of the hose assembly?

4.) Should any oil be added to the circuit like in other cars? Would this inhibit cooling or further lubricate the compressor?

Thanks for your expert advice.

-------------------------
Grove Automotive Group, Inc.

An Alabama Corporation

fonebone on Sat July 25, 2009 12:15 AM User is offline

Tony- Keep the system R-12. You will spend a lot of time and money and NOT be happy with the conversion. Those old Ford systems may look "Old' and clunky, but they where rugged as hell and cooled great. R-12 is readily available, and sure, it's higher in cost, but it is still the best and cheapest option!

Edited: Sat July 25, 2009 at 12:17 AM by fonebone

tony1963 on Tue July 28, 2009 8:37 PM User is offline

Does anyone have answers/recommendations to my questions?

-------------------------
Grove Automotive Group, Inc.

An Alabama Corporation

iceman2555 on Tue July 28, 2009 9:38 PM User is offlineView users profile

Seems the post prior to your last was a recommendation. This vehicle will perform best with R12....the York will work with 134a but the system design was for 12...it will perform much better with 12.

-------------------------
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

fonebone on Wed July 29, 2009 1:31 AM User is offline

Tony--Iceman and my replies to your question was the best advice we can give you. I think that we (those replying) and others here will mostly tell you the same thing. You seem determined to convert an already very efficient and well designed system to one that will cost you bucks and perform poorly. Just what do you have against R-12? You can buy a LOT of r-12 for what a conversion will cost, to say nothing of the labor involved!

Edited: Thu July 30, 2009 at 12:48 AM by fonebone

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