Thaddeus

Hi, I am actually thinking of converting the a/c on my wife's volvo, not the Porsche. Are any of them any good? Any I should stay away from?

Thanks

Thaddeus

Bob S. 1984 Silver

Hi Thad..

Depends on the health of the original system. If it is without leaks then a kit like the one put out by Interdynamics is fairly good; seals minor problems, coats the inside of the hoses (allegedly). The system has to be brought to a hard vacuum, though first in order to eliminate as much of the original oil as possible. I have done a number of cars using these products as an alternative to complete rebuild; (Oh, yeah, you need a new compressor, a bigger evaporator, all new hoses.KaChing!!!..Hey..why not just jack up the radiator cap and put a new car under it?) In most instances, a complete rebuild of the system IF IT IS IN GOOD SHAPE is a waste of time and money.

Good luck!!

Bob S.

Thaddeus

How might a shade tree mechanic bring such a system to a 'hard vacuum' without specialized tools? Or at least, a 'firm' or 'kinda' one?

thanks

Thaddeus

rfuerst

To pull a vacumn you have to have a vacumn pump that is designed for AC systems.I converted my 1987-944S to R134 and it was very easy.I removed the compressor,drained out the old oil and replaced with Ester oil,put it back together with a new drier and then had a friend with a pump pull a vacumn for about 45 minutes.I then installed 2 cans of R134 and voila,cool cheap air.Total cost with the drier and the Interdynamics kit was less than $60.00. <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

pologuy

I hope you can help me!

I just had a new a/c unit put into my '86 944.

I went to have it "filled" and found out that the unit was the OEM one (new one, but the same kind as the original '86 944 had).

It was going to cost me 130.00 to hook it up and 90.00 a pound!

Where the new stuff costs 40.00 to hook up and 16.00 a pound.

How can I change the new system over to the "new" cheaper stuff and where do I get the parts and how hard is it?

Thanks for your help <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />

rfuerst

Hello Pologuy,I am also running the original type AC compressor,it sounds like you have had the original compressor replaced with another,is that correct?What type of oil is in the compressor?There are some folks that will say that it does not matter what type of oil is used,I happen to think that Ester oil is more compatable with the R134.What did the shop tell you?If the system is up to snuff then changing the oil,replacing the drier and putting the R134 fittings on the low and high side and you are ready to go.The shop should be able to do this if you do not feel comfortable doing yourself.Then they pull a vacumn looking for leaks and if none are found aprox. 2 lbs. of R134A and you are all set. <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

PorscheG96

[quote]Originally posted by Bob S.:
<strong>Hey..why not just jack up the radiator cap and put a new car under it.</strong><hr></blockquote>
LOL!

PeteL

I just did this. I replaced the receiver/drier and o-rings. (Also replaced the seized compressor with a good used one, but that's another story). After the new parts were in, a vacuum was drawn for 30 minutes or so. The conversion kit came with 1 can of oil/conditioner and 3 cans of R-134.
Once the vacuum was drawn, the oil/conditioner was added. Then 2+ cans of refrigerant.
3 months still cold a/c in SE Texas. (Damn Hot).
Good Luck