Thread: Insulating the AC system???

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Originally Posted by BigTruckDriver

thanks for the tips guys. I have replaced the compressor , evaporator, and the check valve , forgot the name of that part. Got the system flushed out and converted to the r134. I actually done this last summer but had issues about 3 times with leaks and ran out of cash and the temps cooled down so the work was done last year but recently got it charged up again. From what I have read , the biggest problem will be the condensor, It should be upgraded also to a bigger unit for the r134. Also insulating the evaporator will not do any good and may harm the system but I think I will be fine insulating the plastic housing but will have to use some thing that will handle the heat.
I just got the windows tinted , for fathers day, and am going to pull down the headliner to see if there is room to put some type of insulation on top of that. Later today when the sun goes down, 100+ outside right now, I am going to pull the front grill off and clean the condensor and front of the radiator.

Did you change out your flex hoses when you switched to R134a?? I believe that the material used for R12 is too porous for R134a - the molecules in R134a are smaller, and your charge will slowly leak out if you are running old hoses. You might give someone at Vintage Air a call and be sure I'm right on this before you change any parts, but I think I'm telling you right.

Originally Posted by rspears

Did you change out your flex hoses when you switched to R134a?? I believe that the material used for R12 is too porous for R134a - the molecules in R134a are smaller, and your charge will slowly leak out if you are running old hoses. You might give someone at Vintage Air a call and be sure I'm right on this before you change any parts, but I think I'm telling you right.

I read an interesting nugget on the hoses.
It said that an R-12 hose that's actually had R-12 run thru it previously would be fine.
A brand new R-12 hose that uses R-134a right away will leak.
Of coarse all the o-rings should be the green ones for 134a.