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  #1  
Old 03-30-2010, 11:54 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,571
a/c in 91 vs 93...

the 93 has 134 factory, the 91 has 12
the condensers look identical. not parallel flow or anything...
is the compressor different?
I'd like to upgrade... is upgrade a good word? the 91 a/c to the 93's 134a setup. I'm thinking swap the hoses, compressor and condenser... and put in a new txv... and of course dryer etc.
smart?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #2  
Old 03-30-2010, 12:28 PM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,281
Not in my opinion.
Much better to make sure the system you have is really clean and working properly.
Most of our cars have NEVER had the fins on the Evaporator cleaned...and this is a direct problem with regards to what you feel in the car.
I do not have a manual for your relatively late model automobile... and you might even get lucky and it be easier to clean those fins than it is in our 123's... which is what I compare everything to.
I will be happy to try to guide you through the most useful , cheapest, and effective processes to try before you attempt ' upgrade'... the most important thing you need to know is that the Bottleneck in ANY and ALL AC systems is ' Air across the Condenser'...
NOT THE SIZE OF THE COMPRESSOR. Thus all the hassle, expense and problems with attempting to ' upgrade' a compressor ( unless you have the very old York type) has an extremely high chance of not even being noticed in terms of ' cold in your face'...
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  #3  
Old 03-30-2010, 12:42 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,571
nahh, it's a customer's car. you know the drill. a/c not cooling well, or at all... and I got a parts car to rape, and it's got a working 134a/c system... just bouncing ideas.
it's obviously an early 134 system, might even be all the same parts, with 134 and a different txv. no idea.
I am now thinking of just changing the dryer, and txv and flushing the system, and checking the oil to see if any debris are present. vacuum recharge and set it back to 12.
yeah...
sounds better to me.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #4  
Old 03-30-2010, 03:47 PM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,281
Quote:
Originally Posted by vstech View Post
I am now thinking of just changing the dryer, and txv and flushing the system, and checking the oil to see if any debris are present. vacuum recharge and set it back to 12.yeah... sounds better to me.
Well, that stuff is great standard stuff... if you will do that AND clean the fins on the evaporator I think you might be surprised at how well it works...
DMorrison in Dallas posted a great thread with pictures when he cleaned his...

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