Georgia Fiero Club Forum

All Things Fiero => Tech Tips, Tech Questions => Topic started by: GTRS Fiero on January 20, 2021, 05:34:33 pm

Title: AC compressors?
Post by: GTRS Fiero on January 20, 2021, 05:34:33 pm

There were 2 AC compressors for the V6 Fiero.  My understanding was that the AC compressors were interchangeable, but do these AC compressors have different mounting brackets?

Title: Re: AC compressors?
Post by: Fierofool on January 20, 2021, 05:50:49 pm

I upgraded without changing mounting brackets. 

Title: Re: AC compressors?
Post by: GTRS Fiero on January 20, 2021, 06:07:32 pm

The earlier compressor was the DA6, I believe.  Bring an '88, mine should have the HR6.  The mounting locations appear to be completely different, for the replacement HR6, compared to what is in my Fiero.  The replacement DA6 appears to have the same mounting points.

Title: Re: AC compressors?
Post by: GTRS Fiero on January 20, 2021, 06:08:00 pm

My model numbers above may be slightly off.

Title: Re: AC compressors?
Post by: Fierofool on January 20, 2021, 06:34:57 pm

Our compressors don't have pins in the case sections to align them.  The compressors are used on a variety of vehicles, so one end might be clocked for a different vehicle, though it's the correct compressor for a Fiero. 

Title: Re: AC compressors?
Post by: GTRS Fiero on January 20, 2021, 06:36:48 pm

One mount point is 2" closer to the center, on one compressor.  Clocking likely won't fix that.

Title: Re: AC compressors?
Post by: Fierofool on January 20, 2021, 06:51:23 pm

This is for an 87.
https://www.autozone.com/cooling-heating-and-climate-control/a-c-compressor/four-seasons-a-c-compressor-58255/120975_0_0

This is for an 88.
https://www.autozone.com/cooling-heating-and-climate-control/a-c-compressor/four-seasons-a-c-compressor-58255/120975_0_0

Fits all year V6's.  DA6 or HR6. 

Title: Re: AC compressors?
Post by: GTRS Fiero on January 20, 2021, 07:02:55 pm

Well, supposedly, the DA6 is not compatible with R134a, which may be why mine leaked (the one in my Fiero appears to be a DA6).

Title: Re: AC compressors?
Post by: GTRS Fiero on January 24, 2021, 11:12:23 am

The DA6 compressor is in.  It fits.

Title: Re: AC compressors?
Post by: Fierofool on January 24, 2021, 03:04:04 pm

I don't remember which compressor I bought for the 87, but it was listed as compatible with R12 and R134a.  It was charged with R134a. 

Title: Re: AC compressors?
Post by: GTRS Fiero on January 24, 2021, 05:33:51 pm

This one says it has PAG oil in it, and that it is compatible with R134a.

Title: Re: AC compressors?
Post by: TopNotch on January 25, 2021, 11:17:14 am

My understanding is that the DA6 and HR6, as used on a Fiero, are the same externally, and only different internally. I never had any trouble buying a compressor specified as for a V6 Fiero (any year) and having it not fit. I replaced the compressors on my red 86 SE and my 88 silver Formula. Except for the way the hoses seal to the compressor (they changed that), they were all the same. Some hoses seal with O-rings, and some with washers, if I remember correctly. If your old compressor hoses sealed with O-rings, and your new one requires washers, you may have to find some, as they won't come with the compressor.

Title: Re: AC compressors?
Post by: GTRS Fiero on January 25, 2021, 05:42:04 pm

Well, it will be charged and tested, when the weather warms up.