[DML] Re: Bob's AC problems.
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[DML] Re: Bob's AC problems.

I'm sure you've checked and made sure you have no coolant
What kind of tank are you using, the plastic or metal one? Do you 
need to fill the tank every so often or does it stay full? When is 
the last time you've replaced the water pump? The following could
your problem, so I figure I would mention it. I have a metal tank, 
and after a while my cap didn't seal anymore and my car ran
on the gauge. I finally found that it was the cap-so I took the 
rubber seal off a similar cap and put it on the cap I was using so 
there were 2 seals [double the thickness], and it's fine now
yeah I'll get the correct cap one of these days]. Try this: after 
driving your car go into the engine bay and [with leather gloves] 
squeeze the long hoses that go to the water pump-if there is 
little/no pressure in the hoses, or the pressure is all gone after 
10-20 minutes of driving your car-you've either got a leak or bad 
cap. If you want to rule out the cap for sure then purchase a rubber 
expansion plug (readily available at advance auto or other auto 
stores], put it into the neck of the tank, expand it and run the car 
to test it.

For the AC, drain and flush out the entire system; you gotta get 
whatever crud and debris you may have out of the system; and then 
replace the orifice and accumulator. A good shop that does AC will 
drain and flush it for you at reasonable price if you don't want
go through the trouble. The clutch on the AC compressor will run the 
entire time you have the AC on [at least mine does] unless one of 
the pressure switches cuts it off (very rare-only happens to me if I 
have the AC on and blower fan off). Shouldn't run the whole time
car is running with AC off-make sure you don't have a wire
to the wrong place on the mode switch. If you've been refilling
system yourself, be sure to vacuum it out for a good long time 
before filling-as forgetting this step will cause problems in the 
system as well. John Hervey has the oil amounts to fill the 
compressor with on his site which you will need if you flush out the 
system. I'm not sure about R-12, but some R134 comes with oil
in with the refrigerant so it is very easy to over fill the system 
with oil. If you don't care what kind of refrigerant you use, 
convert to R-134 and get the recharge kit from Advance. It comes 
with a gauge and all that but you still need to determine how much 
oil and refrigerant goes in the system. Only thing you'll need to 
convert is the R134 adaptor for the low side. I have one, it's a 
right angle and I never used it; if you want it-it's yours all
need to give me for it is info on where to send it. You could still 
use this to hook up a gauge if you don't want to convert.
B. #5003

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