[DML] Re: conversion to 134a
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[DML] Re: conversion to 134a



If you cannot find the service connections you don't have enough
experience and knowledge to convert your system. In fact, IMHO, it is
not necessary to convert it. The only disadvantage to staying with
R-12 is that the refrigerent is a little more expensive than some
others. Just about all of the other substitutes will give you less
cooling capacity. To properly change to -134 (or most any other
refrigerent) you have to change the service connections, all of the
"O" rings, the accumulator/dryer, and drain and refill the oil charge.
You can cause a lot of damage trying to replace all of the "O" rings,
especially the ones that aren't leaking! Now, to answer your question
directly, look at the back of the compressor. You should see covers
over the 2 service valves. They should be plastic but could be metal.
One will be the high side and one will be the low side. You must
remember that the high side is BEFORE the condensor coil, not like on
most systems which have the high side service connector AFTER the
condensor coil. The low side is usually close to the evap valve. On
Deloreans we don't have an evap valve (just an orifice tube) and the
low side connector is not near it.
 Your best approach is to take the car to a shop, have it tested for
leaks, get them fixed, and refill with R-12 and a fresh oil charge.
David Teitelbaum
vin 10757



> 
> I'm new to the list and need help on how to convert the AC to 134 A
from the r12.
> 
> I have looked around and have not been able to find any connections.
High or low sides.
> 
> Any help would be appreciated.
> 
> Thanks, Fred
> 
> 1981  #1765
> 
> 
>        
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