Re: R-12 recharge

[srubano@xxxx]

For a car that has sat over 15 years I would definitely replace ALL 
the rubber O-Rings on the A/C system. Over time the O-Rings begin to 
dry out and crack causing a leak. A/C systems should always be turned 
on for brief amount of time once in a while even when it's winter so 
that the oil in the A/C can "lube up" the rubber seals and prevent 
them from drying out. I believe most manufactures now automatically 
cycle the A/C on for a few seconds...you don't feel it since either 
A. you have he heat on and the A/C goes on for such a short period of 
time it's not enough time to get it cold and B. I believe it's right 
after the engine starts up the compressor cycles on/off. 

Replace all the rubber O-rings, including the ones that are located 
on the compressor in-between the compressor body and the two hoses 
bolted to it. They are not expensive and it's easier to do now since 
you'll have the A/C system open anyway. You may want to replace the 
Drier/Accum also since the system was "dry" for some time and 
moisture may have gotten into the system.


--- In dmcnews@xxxx, Delorean17@xxxx wrote:
> Hello,
> A friend of myne was kind enough to let me use his 30lb tank of 
R-12. My 
> car sat untouched for 15 years so I am guessing the freon leaked 
out over 
> that time. The low pressure switch is tripped so I know there must 
be very 
> little freon in the system. I am bringing my car in on Friday 
morning to 
> have it evacuated and recharged. Are there any parts I should have 
replaced 
> at this time? or just see if it will hold a charge? Please let me 
know ASAP 
> so I can next day air them if I need them.
> 
> Thanks
> 
> David
> #6286