Ok, I'm sure this has been covered zillions of times before I came along
here, but....is it OK/recommended to change from R-12 to 134? I'm going to
be oiling my system to hopefully treat the seals so the system will hold
pressure and coolant and want to know if I should have the freon drained,
system cleaned before doing this. Much less expensive to fill with 134 also.

Bob Stevens
'91 Westy

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