Quote:
Originally Posted by 70GMCer
I am starting to get together the parts needed to bring back to life the AC in my 83.
It looks like the system had already been converted to 134 as there are the correct manifold connectors present, but I'm going to replace the orifice tube.
I need to know if the orifice tube for the R134 is the same as R12.
If not, anyone have the part number of the tube I would need?
I'm going to be replacing the dryer, hoses, evap unit & condenser as well as installing a Sanden 508 type compressor.
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You just stated here that you're replacing the DRYER? If your system uses a dryer, I don't believe it will use an orifice tube. Instead, a system with a dryer uses an expansion valve that will be near the evaporator somewhere under the dash...I think.
A system with an accumulator will use an orifice tube. I'm not totally sure that I'm correct on this but I feel pretty certain that I am. One problem is that there is SO much MISinformation out there that it's really difficult to know what you have, how it's supposed to work and so forth. I honestly believe that the industry does NOT want DYI folks like us fooling with their AC systems when so many mechanics have spent thousands of dollars on machinery to reclaim refrigerants and so forth. It's such a huge profit margin for them too.
Here is one very important lesson that I've learned by working with the AC systems on my cars and trucks: DO NOT BUY A REMAN CONPRESSOR! THEY ARE WORTHLESS! Spend a few more dollars and get a brand new compressor. It's not important how I know this.