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  #1  
Old 05-24-2004, 10:25 PM
chazola's Avatar
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Join Date: Nov 2003
Location: Dorset, United Kingdom
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'Tis the season... for my air-con to die- '91 300E

Cranked up my air con the other week and just warm air flowed out, so I took my car to my tech and he converted it to R134a and I had lovely cold air. For a day. Next day- warm air again- so another charge, cool air for a day then next day nada. Then I went on honeymoon.
I know bugger-all about air conditioning systems so I presume I have a leak- my tech say he hopes it's not the evaporator which apparently is $$$'s.
Could it be anything to do with the conversion or something fairly easy to fix?

cheers.
__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys
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  #2  
Old 05-25-2004, 04:11 PM
chazola's Avatar
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Join Date: Nov 2003
Location: Dorset, United Kingdom
Posts: 1,239
anyone?

would a faulty evaporator 'cause the loss of charge just overnight- or does that sound more like a leak somewhere else?
__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys
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  #3  
Old 05-25-2004, 05:42 PM
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Join Date: May 2003
Location: Huntington Beach
Posts: 329
Leak could be from almost anywhere in the system, and it seems like too big a leak to be caused by an o-ring coming out of its groove. I'd have a tech check it out w/ some dye to see where it leaks from.
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  #4  
Old 05-25-2004, 11:57 PM
chazola's Avatar
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Join Date: Nov 2003
Location: Dorset, United Kingdom
Posts: 1,239
I've read some more posts and it seems people are split 50/50 about whether converting to R134a buggers up your system.

can you re-charge with R12 after a R134a conversion or is it a no-going back deal?

my tech says the conversion isn't the reason the charge isn't holding, and I usually trust him, but I'm interested in whether the quick conversion he did could be the problem?
__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys
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  #5  
Old 05-26-2004, 01:07 AM
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Join Date: May 2003
Location: Huntington Beach
Posts: 329
Probably not. Most conversions involve draining/flushing and finally vacuuming the AC system (which may take a few hours depending on the person), changing the service port fittings, replacing any worn hoses/o-rings/etc., adding new oil to the compressor and refilling w/ r134a. Basically a day's work at the most.

If anything, switching to 134 just exacerbated whatever leaks you already had w/ the r12.
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