I was looking around to find an A/C compressor for my 87GT , I already have a new accumulator and orifice valve.

Looking at autozone or advance auto , they list 2 versions , an H6-Or ($190-200) of a H6-Sw ($290-345)

Whats the difference besides price? ( I hope I need the cheaper one? )

the difference is whether they use O-rings (OR) or sealing washers (SW) where the lines from the car connect to the compresor. you can use either one, but if you get the sealing washer type make sure you get the full sealing washer kit with the various inserts.


Rich

[This message has been edited by Richjk21 (edited 04-27-2008).]

Thanks , that makes sense now.

Another question, The switches in the compressor, the high pressure switch , there are different color ones , (Blue, Red, White, Green, Purple)
My guess is different colors = different pressures the switch trips at.

What would the correct switch be for converting to 134a?

Also I have a new switch on the accumulator, These are adjustable , or so I was told. How do you set these to be correct for 134a?

Thanks!

as far as the compressor switches go, I just transferred the ones from my old compressor over to the new one. I believe on one of the major AC component sites they have info on the various pressures for the different switces. To adjust The pressure (cycling) switch on the accumulator you remove the plug that connects to the switch and if you look into the switch where the plug goes there is an opening where you insert your tweaker (small screwdriver) to adjust the setpoint screw.


Rich

I am working on converting mine to 134A this weekend , My question is on the high pressure port I have to install a new coupler (came with the conversion kit) how do you remove the old shrader valve. It is not like a stanard valve. And i cant quit get upside down to look into it to be able to guess better.
Mike

I'm trying to remember from when I did mine a couple years ago, but I thought it was just a regular screw in stem. Meaning you didn't have to remove the connection, just the stem from the center and the new R134-A fitting screwed in/onto the original R12 fitting.


Rich

Using a mirror and a flashlight I was able to get these numbers off my compressor ( 87 GT)

Model : 1131468

Code : 081961

I have searched the net and can't find out if this is a DA-6 or a HR-6 compressor , I did find a list that had 1131469 listed for the Fiero but did not specify what type it was.

Anyone know where I can find out what compressor I have?

quote Originally posted by Panzuur: Using a mirror and a flashlight I was able to get these numbers off my compressor ( 87 GT) Model : 1131468 Code : 081961 I have searched the net and can't find out if this is a DA-6 or a HR-6 compressor , I did find a list that had 1131469 listed for the Fiero but did not specify what type it was. Anyone know where I can find out what compressor I have?

Stolen from: http://www.fierosails.com/PartsManual.html

'85-87 2.8L: There is some confusion (certainly on my part) about the compressor for these Fieros. The Hollander manuals say the compressor is the HR6HE (Harrison Redesigned High Efficiency 6 cylinder). The Pontiac "22P" manual refers to the compressor as the Harrison "DA6" (Downsized Axial 6 cylinder) and we believe the latter to be correct. The DA6 compressor has two electrical connections on the back end. Note that the DA6 is not considered a good candidate for conversion to R134-a refrigerant, probably because of the higher pressures.

The vehicles listed below are from Hollander and are in reference to the HR6HE compressor. While the compressor designation may not be correct, odds are the cars will have the same compressor as the Fiero. Finding a compressor may not be as simple as finding a potential donor vehicle. In general, an exact replacement may not be necessary to achieve adequate cooling If a compressor will fit it may be worth trying. Compressors from other Fieros are good candidates for swaps, but brackets my have to be transferred along with the compressor.


Pontiac Astro '85-86 2.5L
Chevy Blazer S10/Jimmy S15 '85-86 2.5L
Camaro '83-85 2.5L
Firebird '83-85 2.5L
GMC S10/S15/Sonoma '85-86 2.5L
GMC Safari '85-86 2.5L

Thanks , I thought they started using the HR-6 in 87, so I guess I should assume I have a DA-6 , and buy a rebuilt compressor,
for my 134a conversion, thought I might get lucky and already have an HR-6 and save $200.

The HR-6 is the correct compressor for any V6 Fiero, as well as some of the 4 cylinder models. The HR-6 was intended to supersede the DA-6 in virtually all applications, due to its higher reliability. The 'R' in HR-6 stands for 'Revised' (i.e. HR-6 => Harrison, Revised, 6-cylinder design).

[This message has been edited by Marvin McInnis (edited 05-23-2008).]

GM compressor #1131468 crosses to ACDelco #15-20240 which was used in 1985 Buicks and Olds with 3.8 engines, according to ACDelco. The clutch coil terminals are at 10 O’clock rather than at 2 O’clock (Fiero). So either the compressor was previously changed out or the ACDelco data is bad. Either way, it’s not a HR6 so it should be replaced when changing to R134a.

The code number (081961) means it was made on 08/19/86 (first shift) which is odd if it was for an 85 application. It would make sense for a 1987 model.

[This message has been edited by spark1 (edited 05-13-2008).]

Thanks spark1 , thats the info I was looking for, I was searching and found a 1131469 was for the Fiero, (if i remember correctly)
Laying under the car with a flashlight and mirror reading backwards numbers, I bet that 468 is more than likely 469, ( close vision goes to hell after ya hit 40 )

So the date code is for 86, so its a DA-6 , I'll just get a rebuilt and be done with it.

Thanks for the help! Tried to give you a "+" but I guess I need 30 posts first, you get one when I hit 30

[This message has been edited by Panzuur (edited 05-13-2008).]