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#12789 - 07/19/05 05:52 PM A/C Compressor Lock -up  
Joined: Jun 2000
Posts: 526
StripedSS Offline
20+ Year
StripedSS  Offline
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Joined: Jun 2000
Posts: 526
Hampton. GA By way of ATL Ga.
Doing the R-134a changeover. The compressor had been sitting dormate since spring of '02. vaccummed it down, got it running, ( had to jump the pressure swith connector ) started to add the 134 ( which had the oil , stop leak, leak ck in the same can ) and major lock up. The squealing and smoking type lock up.

Now I need a new compressor yes? Question is do I get the same model or is there a model specific to 134a that could be obtained?


87 SS
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ZZ4 Crate Motor plus a lil go go juice
#12790 - 07/19/05 07:48 PM Re: A/C Compressor Lock -up  
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200kSS Offline
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200kSS  Offline
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Bloomsdale, MO
Most likely yes you will need a new compressor. Also check the orfice tube for metal shavings since the compressor has failed. A new accumulator wouldn't hurt either since the system has been open/unused for so long.

As far as charging, if the system was in a vaccum I would have added a can of refridgerant and let the compressor cycle itself to avoid running it dry (with no oil). Only jump the pressure switch as a last resort. HTH


88 SS Black/Oxblood. Power Tour car
80 Malibu 2dr. Drag Week car
#12791 - 07/19/05 10:31 PM Re: A/C Compressor Lock -up  
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StripedSS Offline
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Hampton. GA By way of ATL Ga.
Thanks. Look like I will be aquiring new parts.


87 SS
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ZZ4 Crate Motor plus a lil go go juice
#12792 - 07/19/05 11:55 PM Re: A/C Compressor Lock -up  
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SSScottSS Offline
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SSScottSS  Offline
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S/E Wisconsin
I just got mine running this year. Hadn't worked since I bought the car around 9 years ago. Here's what I'd do if I were you. Get a new compressor, dryer, and orafice tube. Those are the absolute minimum parts. Anything more would be dependant on their condition, but you MUST get at least those parts.

Flush the system well, and put it together with new o-rings and the new parts. Pull a vacuum for a good 1/2 hour at least, and charge it up. You can buy the same compressor as what the car had originally. The new dryer should be compatible with either R12 or R134A. I went with the standard orafice tube, the white one, but some say the Ford blue ones work well with the conversion, or the variable rate ones. I bought one of the variable ones, but I couldn't get it to fit for the life of me.


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#12793 - 07/20/05 12:06 AM Re: A/C Compressor Lock -up  
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ss4ever Offline
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Shelbina, Missouri
I wouldn't use that freon that has the oil in it, I haven't had much luck with that stuff.


1983 Monte Carlo SS Turnkey ZZ4/700R4, Dakota Digital Instrument Cluster, 77k mile car. Many more mods to come soon.
#12794 - 07/20/05 01:34 AM Re: A/C Compressor Lock -up  
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baaboo Offline
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Racine, WI
Also put the first two cans in upside down, so it goes in quicker as a liquid. That's what my cans said. So a new accumulator/drier is pretty much a must guys? Thanks.


1987 Aerocoupe, 383 Super Ram and 20-gallon custom aluminum tank. Car retired (for now) from open road racing, but I'm not.
#12795 - 07/20/05 02:17 AM Re: A/C Compressor Lock -up  
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ss4ever Offline
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Shelbina, Missouri
Yeah, if the system has been open a while or inoperable then a accumlator/drier and orifice tube is a must. I replaced my drier a few years ago and it made a big difference, much colder than before.


1983 Monte Carlo SS Turnkey ZZ4/700R4, Dakota Digital Instrument Cluster, 77k mile car. Many more mods to come soon.
#12796 - 07/23/05 12:59 AM Re: A/C Compressor Lock -up  
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85SSMan Offline
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Wichita, Kansas
When you change to r134 you are sposed to change all parts to r134 compatable replacements, which means buying remanufactured parts from the parts store. You should hold the can upside down and try to keep the can warm, that will force the freon out of the can faster. Best thing is to use compressor oil by its self, and freon by its self. You can use the mixed stuff, just not the best thing for the long haul.



1985 Monte SS, Rebuilt L69 with TPI. 200-4R Tranny. 951 Modine with TPI duel fans. True 2 1/4 Flowmaster Duals. B.F.H. made dual hump crossmember. Stock Suspension, interior, and body.
SOLD TO INTMDATR3 ON 03/04/06
#12797 - 07/24/05 08:06 PM Re: A/C Compressor Lock -up  
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StripedSS Offline
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StripedSS  Offline
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Hampton. GA By way of ATL Ga.
Guys A/C isn't critical for me. I'm not gonna change / replace anything that I don't have to. I don't necessarily need the A/C to be cold, just cool. What I am gonna do is see if it is infact a myth that all those things need to be replaced. I hear so many differnt ways of doing the changeover.

So what I am gonna do is get a new compressor, add some of the 134a compatible oil before I install it, then install it and vaccumm the system down for 30 min ( again ) add the 134a, then the rest of oil and see what happens from there. Real live field testing.

Thanks for all the info you guys provided.


87 SS
[Linked Image]
ZZ4 Crate Motor plus a lil go go juice
#12798 - 07/24/05 09:19 PM Re: A/C Compressor Lock -up  
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mrapii Offline
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Waipahu
I've personally done the quick and dirty freon swap on a couple of cars and the AC is still working Ok after several years, however on my own personal cars I would at least change the receiver/drier and do a complete flush.

#12799 - 07/24/05 09:33 PM Re: A/C Compressor Lock -up  
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ss4ever Offline
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ss4ever  Offline
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Shelbina, Missouri
Any compressor company will not stand behind their compressor if you don't change the drier.


1983 Monte Carlo SS Turnkey ZZ4/700R4, Dakota Digital Instrument Cluster, 77k mile car. Many more mods to come soon.
#12800 - 07/24/05 10:32 PM Re: A/C Compressor Lock -up  
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StripedSS Offline
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StripedSS  Offline
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Joined: Jun 2000
Posts: 526
Hampton. GA By way of ATL Ga.
Quote:
Any compressor company will not stand behind their compressor if you don't change the drier.
I understand this. However I'm not to concerened about wheather or not the compressor holds up, because A/C isn't critical for me in the monte. I hardly ever drive the thing. I just want to see how long it will hold up.


87 SS
[Linked Image]
ZZ4 Crate Motor plus a lil go go juice
#12801 - 07/25/05 01:04 AM Re: A/C Compressor Lock -up  
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85SSMan Offline
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Wichita, Kansas
Do it the dirty way it will work. I am using all salvage yard parts from when I did my TPI swap from 10 months ago and it still works fine.



1985 Monte SS, Rebuilt L69 with TPI. 200-4R Tranny. 951 Modine with TPI duel fans. True 2 1/4 Flowmaster Duals. B.F.H. made dual hump crossmember. Stock Suspension, interior, and body.
SOLD TO INTMDATR3 ON 03/04/06
#12802 - 07/25/05 01:10 AM Re: A/C Compressor Lock -up  
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ss4ever Offline
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ss4ever  Offline
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Shelbina, Missouri
I would buy a used compressor then, save some money that way. I have done things this way also.


1983 Monte Carlo SS Turnkey ZZ4/700R4, Dakota Digital Instrument Cluster, 77k mile car. Many more mods to come soon.

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