Refrigerant Type: R134
Country of Origin: United States
I am retrofitting a 70 chevelle with an engine from a 1995 caprice and am using most of the cooling and A/C systems as well from the 95 caprice. The only part I could not use was the evaporator, it was too big for the chevelle evap case. I dont want to use the original 70 evap because it used a POA valve, I wanted to stick with a fixed orifice system evap to work with the caprice system. I found that an evaporator from a 1991 firebird fit perfectly in the chevelle evap box so am using that. Problem is the nut on the output side of the evaporator is standard thread and the accumulator that I want to mount to it has female metric threads. Is there an adapter made that will thread onto the standard nut and have metric threads on the other end for the accumulator to thread to? I will try and attach a picture.
Not sure about adaptors, but you might want to check 95 and up GM truck front evaps, maybe Tim will have another answer, but the Jimmy's and "S" series trucks used the underhood evaps like the chevelle, but I'm not sure of the size.. Someone will be along to help you further..
Freedoms just another word for nothing left to lose
thanks, it is tough to tell the exact size of the evaporator when it is installed in the vehicle, but I will check the parts sites. Any idea when metric fittings started being used? I have to guess around 1993 for GM?
I could also install a firebird accumulator, it will bolt up to the evaporator, but then of course it will have the wrong threads for the hose. Are the actual steel line sizes also different between metric/standard, that is would it be possible for me to cut the metric nut off my hose, install a standard thread nut, and have the end reflared?
Edited: Sat April 04, 2009 at 5:14 PM by drptop70ss
Using a hose with one end SAE & one end metric will save a lot of trouble. Areoquip (EASYCLIP) has field fitting, so you can turn it the way you want.
diesel is music, music is noise!
All gm systems went to metric threads with conversion to 134a...
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
thanks for all the help, I appreciate it!
Chick may be on to something, I checked out the engine compartment of the 95 up S10 and it sure looks like it has parts that will work with my hoses as is, just hoping the evaporator is the size I need. I will check that out first, and if no go then I will get the firebird accumulator and have the hoses modified.
One last question..
the firebird evaporator has the orifice tube in the inlet tube, how do you remove it with the crimps being there to hold it in place? Just yank it out with needle nose pliars? The caprice condensor has it mounted there so I dont need it in the evaporator.
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