Automotive Air Conditioning Information Forum (Archives)

JeepSJ on Tue March 22, 2016 7:01 PM

Year: 1987
Make: Chevy
Model: R30
Engine Size: 454
Country of Origin: United States

Hi all,

Just picked up a new project vehicle - 1987 CC Dually, 454, TH400. Rust-free Arizona vehicle, with only 86K original miles. Bought it from a neighbor, who bought it from another neighbor (original owner) about 2 years ago. A 134 conversion had been started on it, but original owner doesn't live in the area any longer so I can't get any details. The A6 compressor appears to be new, as does the accumulator/receiver-dryer and most of the lines. Adapter fitting have also been installed on the charge ports. Receiver/dryer *may* have been upgraded as it appears to be the same as on one of my later model vehicles.

Here are the questions -
1) Will the A6 do OK with R134, or should I look at converting to a R4 or Sanden type?

2) How can I tell if any oil has been added to the system? And what type?

3) Evap and condenser appear to still be the originals. Should I pull and flush?

Thanks!

TRB on Tue March 22, 2016 8:38 PM

1 With proper oil the A6 will be fine.

2: You won;t really be able to tell. Only way to know is to flush the system and add back the correct oil.

3. I always suggest starting with a clean system.

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JeepSJ on Wed March 23, 2016 1:48 PM

Thanks! Besides checking the oil and flushing the evap and condenser, is there anything else that I should look out for? I've read through some older posts where someone was recommending a Ford "blue" orifice tube?

Edited: Wed March 23, 2016 at 2:13 PM by JeepSJ

mk378 on Wed March 23, 2016 3:25 PM

If it is at zero pressure now, do a static leak test before taking anything apart.

igor on Wed March 23, 2016 4:23 PM

a6 will work with r134
a6 uses pag 150 oil with r 134
a6 leaks on front seals...i tried the trick on this'webiste...but it didn t worked for me...i think my front axle is too much used
a6 are not selled new but remanufactured so it can leaks...so i bought s6 compressor at rockauto
you need a new dryer and a variable orifice tube
you need barrier hoses too...repro or rebuilt
you need a new setting if you have a cycling switch