On 8 Oct 2004 13:33:58 -0700, dr firstname.lastname@example.org (Don) wrote:
I have converted a Volvo, 3 years ago , Pontiac 2 years ago, and
Lincoln in spring of this year successfully with Interdynamics kit
from Kmart as per enclosed instructions. Only affixed new valves.
All systems are still working well.
R-12 disappeared due to an 'accident'.
If R-12 is all gone, there must be a leak. Conversion does not fix leak.
To do the job right, you need to find the leak and fix it first. R-134
is less efficient than R-12. To get maximum performance from R-12
design, you need to evacuate the system like Tiger said. Only
R-12/R-134 contribute to cooling, the more other stuff (air, moisture,
mineral oil) the less refrigerant you can put in, and the less
performance. Moisture also contributes to internal corrosion which is
the #1 enemy of AC system.
Other than fixing the leak, replace other failing parts while the system
is empty is easier and cost effective than doing it later. In minimum,
replace the dryer/accumulator. Drain as much mineral oil as possible.
Refill the system with proper amount of ester or PAG oil and R-134.
Never put R-134 more than 85% of R-12 capacity.
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