"george farquharson" <email@example.com> wrote in message
> What's the scoop on fixing the AC yourself; I assumed that was a pro job.
> I've got an 86 760 turbo that has a leak in the AC but I never assumed I
> could fix it myself. Cheers....George
Well first, do some homework, read up on how the system works and find the
R-134 conversion manual, I know it's online. Then if it was leaking quickly,
find out why, in my case the hose on the back of the compressor had rubbed
on the bracket and made a pinhole. Once you figure that out, order the R134
conversion kit which comes with a new reciever/dryer, orifice tube, O-rings
and some other bits. You'll also need the supplementary kit for most cars.
While you're at it, pick up a new pressostat since it's only about $10 at
any autoparts store.
You'll need a few special tools too, the main one being a vacuum pump. I
used a surplus rotary compressor designed for a window A/C unit which I got
for $5 from www.usamfg.net
, you'll also need a 21uF run capacitor for the
unit if you go that route which is about 2 bucks from the same place. A
little ugly but surprisingly I found it pulls a better vacuum than the
"real" vacuum pump a friend of mine has! Also you'll need a charging hose, 3
cans of R-134a refrigerant, ester oil, refrigeration solvent, and some large
box end wrenches. All of that stuff can be bought at most autoparts stores.
It's a bit of work and requires some care but if you do it yourself it can
be done for under $200 depending on condition of existing major components.
Sure beats the $1k+ for a pro job. If you get stuck or have questions feel
free to contact me directly as I've done a few of these now. One thing worth
mentioning is that with the stock condenser you'll get slightly reduced
cooling capacity compared to R-12 but R-134a is a fraction the cost at
around $5/lb while R-12 is going for more than $100/lb.