ac for the blazer

[Jdog44]

I am getting ready to put ac back in the blazer The compressor froze up a couple years back and i didnt have the cash to fix it. What do you guys think should i fix the om system or buy a vintage air system?

[dtlilly]

More than likely just the clutch frose up on the compressor. Put a new clutch on it and get all new O-rings for the lines and squirt some 12 back in it and you'll be set. Converting to 134 will reduce the quality of your cooling and will shorten the life of your system.

[bouncytruck]

If you have the original, I'd fix that. You're probably going to have to convert to the new R134a freon.

[71RestoRod]

I just finished a Vintage Air install in my Blazer and so far I'm really happy with the fit and finish of it (haven't charged it yet to know how cold, but it blows real hard!). It's fairly stock-appearing under the dash and it really cleaned up the firewall.

My '71 originally didn't have A/C, so the VA unit was an easy decision for me. Had it been an original AC truck, I would have definitely restored the OE unit.

[71jimmy]

71RestoRod, PICS, PICS, PICS, please. I'm thinking of the same when the time comes.

[Gee_Emm]

Nothing looks as good as the factory type. Since Blazers and pickups are the same in the AC dept I will move this to the 67-72 message board so it gets more responses.

[JimKshortstep4x4]

It sounds like most of your original system is there and is good. I would just fix the compressor and what ever else is needed.

Jim

[Jdog44]

Thanks for the input. I am going today to see how much it will be to fix the original system. not having ac in az in the summer is nothing nice lol.

[BobbyK]

Here are a few posts I made on ac kits .com site. http://www.autoacforum.com/

I converted my 71 Blazer's orig. R-12 system to R-134


After a few problems things are now working great.Lot's of pic's in the links.
http://www.autoacforum.com/messagevi...AR_MSGDBTABLE=

http://www.autoacforum.com/messagevi...AR_MSGDBTABLE=

http://www.autoacforum.com/messagevi...AR_MSGDBTABLE=

[dtlilly]

Originally Posted by Jdog44

I am going today to see how much it will be to fix the original system.

You can do all the hard work your self. Just replace the bad clutch on the compressor (or the whole compressor if you chose). You need to order a kit that includes all the O-rings on every line in the system. Not a big deal, just follow every line, and replace the O-ring where ever there is a joint or disconnect (this is only in the engine compartment).

I know, I owned a shop, we would charge $600 or more for this type of job, and all it cost us was maybe $5, plus freon. R-12 has gone through the roof, but the 2# needed to fully charge an empty system shouldn't cost you more than $150-$200. Make sure the shop uses a vacuum pump to draw the system, making sure there are no leaks. Then they can apply the "drug" and your A/C will be blowing 40 degrees F.

I know from experience. If you change from R-12 to R-134, your system and components are made for R-12, and when you ask them to run on R-134, they will work, but not cool ar cold as original, and eventually components will fail, because 134 runs on a higher pressure and will ruin the original r-12 system over time. I would do a R-12 to R134 conversion if requested by the customer, but I would make them sign a release of liability form if the R-134 ruined their system.

anyhow, just replace your pieces and seals, have a shop administer R-12, and you will have a good system for several years.

[Jdog44]

hey thanks for the good info and links .well i went to see the guy my brother inlaw uses for ac work and he said he could get it all hooked up running for a reasonable price. But i got side tracked with a 73 blazer that he was selling lol. I had been looking for a older truck for my son who turns 16 soon .Soo i ended up buying the blazer. Now i will have to wait a few weeks to get my ac fixed I have a ? What is this small line coming of thetop of the evapcore and can you buy a new one are can it be fixed, welded mine is broke off.

[BobbyK]

If you can braze/weld aluminium you can fix it.Otherwise you'll need another evap. core.