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  #1  
Old 10-03-2001, 04:19 PM
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Question Early vs. late W124 A/C condensers

Can anyone confirm that the R12 condensers in the older W124's are not as big/dense as the R134a condenser of the later model W124's?

For the 6-cylinder W124's, can I easily switch out the older R12 condenser with the newer R134a, or are there fitment and plumbing issues? Can I keep my single A/C fan, or do I have to go to dual-fans?

Thanks,
:-) neil
1988 360TE AMG
1993 500E
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  #2  
Old 10-03-2001, 04:28 PM
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I am not an A/C expert by ANY means, but I do know that an R12 to R134a conversion involves much more than a compressor swap.

The refrigerant molecules of R134a are smaller, and therefore would leak though R12 seals, connectors, and plumbing. So those would have to be replaced for starters...
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  #3  
Old 10-03-2001, 04:36 PM
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My system has already been converted, but it just doesn't cool-down as quickly as our 1993 500E.
There are no leaks, and it has an 80% capacity charge of R134a.

I'm thinking it's because of the A/C condenser and/or not having dual-fans up front.

Looking for any help.

Thanks,

:-) neil
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Old 10-03-2001, 04:42 PM
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Oops, you were referring to CONDENSERS, not COMPRESSORS, as I erroneously pointed out.

From the A/C posts I've read, those who have done the conversion say that R134a doesn't cool as well as R12.

Again since I'm not an expert, I don't know if there is a way to "hot rod" the A/C...
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Old 10-03-2001, 05:24 PM
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The following thread may be of help. At any rate, Benzmac has an interesting comment about the expansion valve.

condensor inefficient
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  #6  
Old 10-03-2001, 08:09 PM
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I went thru this process a few months ago. At some point, MB put larger compressors and 2 cooling fans on the 124... Those cars, apparently, take the 134 changeover better. We did ours this summer, and it's not bad. Consider that we live in South Texas - "not bad" is pretty good, most places.
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Old 10-04-2001, 12:27 AM
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Bill- are you saying that you put in a bigger compressor and condenser, and even went to dual A/C fans?

If so, was the conversion a bolt-on deal, or lot's of "gotchas"?

If not, what parts did you replace, and did you factory MB parts, or aftermarket (like condenser)?

Thanks,

:-) neil
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