Ehughes

I was at Autozone trying to find a frickin belt for my alternator w/ air pump nixed. I asked them about an a/c compressor for a 93 rx7. They claim to have one for $389.00 and said it fits all 93's. I thought Mazda spec'd two types of compressors on the 93's. And if so does Autozones fit both?

Any one know?

DamonB

The physical mount to the motor may be the same on both, but I bet the line connections to the compressors differ and therefore you can't just swap them. I know this is true for the drier, as the systems are completely different.

Ehughes

Thanks for the reply. I figured I would remove the bad compressor and take it up with me. The drier is a dealer item.

Should I replace anything else when I do it...other o-rings??

Tom93R1

iTrader: (2)

There were 2 different A/C systems in '93. Just get the compressor from your local dealer. I got a new, not rebuilt, flrom the dealer for my '93 for I think $270, might have been $370 but that is still the same as the Autozone price and it will be OEM. Plus they will know which one to get you based on your VIN.

Ehughes

I have been told, but not sure, that two possible systems on the 93 have two different compressors....one is around $380 and the other is like $1,100! If my system requires the latter and Autozone's will work...then I go autozone. Otherwise, your correct, OEM is better in this case.

forcefed1

WHILE YOU'RE in there you should replace the expansion valve (attached to evaporator) and the dryer.
Dealer wants 180$ for the exp valve... Autozone doesn't have a listing. for a 93 RX7
after extensive web research I found the denso number for the part and learned just today it crosses with a 93 toyota COROLLA as you can immagine a lot easier to find. Auto zone has a listing for a corolla... 35$ for the part.
now the drier is like 80$ from the dealer.
Im having problems figuring out how to cross that one.
Oh for ref.
this is a 93 car with R12. Im keeping the R12.
any time you have a compressor go you should replace the expansion valve cause it can foul it up with metal shavings.

If you are in need of an expansion valve for r 134a then get the one for a 94 toyota camry
as for the drier.

I plan to put my drier in the oven at 230 deg f for an hour or 2 to Dry the desicant out in it.
If you have opened your AC system for any period of time the dryer wil saturate from the moisture in the air and you'll need to dry it out.

As for the compressor
I can't help you hope I never have to either.
but Im sure it crosses with another less rare car therefore making it much better priced.

RX7FAN

The desicant is going to hold onto the water better than the boiling point. you should go to 400F unless you have a Vacuum drying oven like I do then you will be able to pull the water out at lower temps.

Ehughes

Holy crap! Forcefed1, you da man! Thanks for the feedback. I only wish I got this kind of response on my Airpump thread.

Thanks again. Yeah, the cross ref. part thing saved me about $10 on an a/c relay...Ford part (I thought that was the problem before the compressor went whack).

I will check the a/c compressor part # this weekend.

forcefed1

IF YOU GO TO http://www.iluvmyrx7.com

and hit 3 gen
manuals
owners manual and ref material
then go to AC

it lists all the compressors from all kinds of japan made cars. just leaf through there to see what mdel compressor you have and find your vehicle match with one of the mroe popular cars on the list.

this should hook u up on cheeper compressors.

OH and thanks for teh tip on the desicant.
does anyone else have a tip on drying out the receiver dryer?
I suppose Ill just run it up to 400 and hold it for a while

how long will I have to hold it to dry it out?

forcefed1

Won't 400 F bother the oil in teh dryer from the freon?

Ehughes

rx7fan seems to know the drier info. I know notta about the drier. Thanks again!

suprfast

hey guys i work at an autozone, so if you need any help let me know. i too own a third gen(duh, im on the forum) so i know about the car. i love taking my spark plugs to work and hear people go, "what the hell is this". damn domestic heads
kris

Ehughes

Suprfast -

I may be asking you some ?'s soon. Thanks for the offer.

pomanferrari

iTrader: (1)

Accumulator and drier for $20 from a 93 Corrolla



The expansion valve is $40.00

pomanferrari

iTrader: (1)

http://www.ackits.com/index.cfm?fuseaction=FindAKit

DamonB

But there are still two different driers for the two different a/c systems...

charliegt

Check the forums for a used one. I picked one up for $75. As far as fitting any 93, I have no idea - check the manual or talk to the Mazda dealer about that one.

-Charlie

pomanferrari

iTrader: (1)

The other one can be found when you input information for a 1993 Mazda RX7. My drier looks like the Corrolla one.

ronarndt

I just went thru this with my 2nd gen. If you can find someone at autozone or napa that is actually helpful, they can go to the old fashioned *paper* parts list to match up the compressor, drier, etc. There are excellent drawings of the actual part to show shape, size, fittings, etc. The actual manufacturer of the part- Denso, Four Seasons, Hitachi, etc. makes the part and it usually fits more than one type of vehicle. You just have to go page by page to find your RX-7 part on the nissan or toyota page.
Ron A.

DaleClark

iTrader: (55)

Dunno who made the FD system, but the two systems on the FC are made by Nippondeno and Sanden. I believe the Sanden system is the port-installed, and Nippondenso is the Japan-installed for the FC.

Almost positive the FD Japan-installed system is Nippondenso, not sure if they swapped suppliers for the port-installed system.

Anyhow, that's an excellent point - most AC systems are pretty standard, with a few parts that are car-specific. Why reinvent the wheel making an AC compressor when you can call Nippondenso and have them ship over one that's the right size, capacity, etc. for what you need. Same goes for simple parts like the receiver/dryer - heck, that's just a round canister with dessicant in it.

I think the only car-specific parts are the hard lines, the condensor (since the brackets and hose connections are specific to the car's layout) and the evaporator. I wonder if the evaporator's core is universal - that would be a good deal.

Anyhow, there's some good AC info here. I've taught myself quite a bit about AC systems (and got my EPA certification so I can buy freon legally) and they're really not that hard. It's a shame when you see someone rip out an AC system just because they don't understand it, or won't spend the time to understand it. Chicks dig working AC .

Dale

turbojeff

iTrader: (30)

Cool thread, thanks for the tip Dale.

Just another FYI, I had a FD from Canada, the condensor was not the same as either US model. It had a "Touring" type drier but the condensor was different than either one I had. I ended up getting the fittings cut off one condensor and welded on another for $20.

AC working is the way to go. Driving around in the heat sucks.

DamonB

Right. Which is why when I couldn't locate a drier that didn't cost an arm and a leg the (very knowledgable) automotive a/c guy told me just to bake it in the oven. That removes any moisture and makes it as good as new