Hi - I am in need of some help ( I will at this point say thanks to top notch who has guided me ) on my a/c conversion to 134a

the car is 87gt and this is what I have done so far

cleaned the area where the a/c "radiator" hides in the front bulkhead (not much debris in there)
replaced the orifice tube including new o rings
removed my compressor (this is a rebuilt one but on advice took it out and drained the oil).

my questions are as follows;

which port do I pour the oil into on the compressor ? one is marked s the other is marked d



which port do I pour oil into my new accumulator?



please could you tell me sealing washers to use on the compressor ? the conversion kit from the fiero store contains two types a pair of thicker washers with rubber inside and a pair of thinner washers also with rubber inside (if this makes sense)
the thicker type washer


the thinner type washer


all opinions welcomed

Jon m

Well, pour the oil in the "s" port. That is the suction port. Make sure you turn the compressor ten times by hand in the direction the belt would turn it. That will distribute the oil. Used any port in the accumulator. Then let it sit standing upright. As for as the sealing washer go, you have to figure that out. Some of the manifold ports are off set and you would have to use one of each size. Some are even-deep or shallow. Looking at your manifold and set the washers on it. The washers should be level were they mate to the compressor. I hope that helps

thank you - is it wise to put some of the oil into the "little radiator thing" (do forgive me) which sits at the bulkhead which then flows into the accumulator ?

jon

If by "little radiator thing", you mean the evaporator, you don't need to put oil in it. The evaporator is in front of the car's engine radiator.

the "little radiator" I was referring to is on the passenger side behind the plastic cowling that houses the blower?
if this helps
jon

quote Originally posted by TopNotch: If by "little radiator thing", you mean the evaporator, you don't need to put oil in it. The evaporator is in front of the car's engine radiator.

Condenser. The evaporator is in the dash.

quote Originally posted by Formula88: Condenser. The evaporator is in the dash.

o.k - I now know the names of the parts.

I have cleaned the evaporator in the dash area (removed the blower and the large black plastic clover and the black putty stuff)
I am going to look at the condenser next to the radiator to see if any o rings need changing.

so far I have put the ester oil in the suction side of the compressor - I am going to put some in the accumulator - do I need to put the ester oil any where else ?

any opinions welcomed
Jon m

Hi Jon m. No. Your good. I followed Randye and Marvin McInnis plus super help from others with their conversion and it worked great. It is under search "randye" - titled " What A/C compressor do I have?...plus more dumb A/C questions" great info, parts and back and forth questions and answers. Your already on your way. This thread should give you all of the info you need. Good Luck!

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FIEROBUG

[This message has been edited by fierobug (edited 04-06-2014).]

Thanks for the help.

I have now fitted the accumulator with some ester oil and fitted.
replace the old o rings at the condenser, the accumulator, the orifice tube and at the compressor tube both ends.

I am right in thinking that all I need to do now is have it checked for leaks and maybe flushed cleaned and then topped up with refrigerant gas ?

Jon m

A procedure that is recommended is to remove all of the old 525 mineral oil from the system as this takes up space that the R-134a would occupy. While flushing is not necessary opening the lines, blowing them out and dumping the compressor oil out is beneficial. Remember that after you put back all of the connections, to evacuate to 29" hg before charging. This is very important for proper operation.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

Thanks Dennis I will bear this in mind when I take it to be flushed next week

jon

Well as an update goes I have now decided against a/c as of yesterday
am on test runs to see how the car performs as I am planning a road trip see here https://www.fiero.nl/forum/Forum1/HTML/093379.html
And found that the belt may have been a little too tight on and as a result my unused reman compressor seized and nearly had the belt on fire.
thanks for all your help
jon

quote Originally posted by jon m: Well as an update goes I have now decided against a/c as of yesterday am on test runs to see how the car performs as I am planning a road trip see here https://www.fiero.nl/forum/Forum1/HTML/093379.html And found that the belt may have been a little too tight on and as a result my unused reman compressor seized and nearly had the belt on fire. thanks for all your help jon

Job the club. I learned the same lesson a few years ago but all it did was destroy the pulley/clutch bearing and torched the clutch (it was sizzling.) $60 later and it's been working well for years.