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  #1  
Old 07-27-2005, 09:33 PM
memario213's Avatar
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R12 or R134

does any body know what kind of freeon the 93 500sel/s500 uses

i was told it uses r12

r12 or r134

thanks

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  #2  
Old 07-27-2005, 09:35 PM
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Quote:
Originally Posted by memario213
does any body know what kind of freeon the 93 500sel/s500 uses

i was told it uses r12

r12 or r134

thanks
easy way to tell is look at the fittings on the A/C lines if they have what looks like tire valve stems under metal caps its R-12...if they have a quick connect fitting its R-134.
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  #3  
Old 07-27-2005, 10:01 PM
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There is a yellow Refrigerant ID tag near the radiator.. some changed in 92, some in 93.. look there.
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  #4  
Old 07-28-2005, 12:04 AM
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someone posted in another thread that all the w140s were R134, don't know how accurate that is
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  #5  
Old 07-28-2005, 01:34 AM
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AC dryer and Compression valve

I found ac tag its located under the hood on the left side its green. it says R-134

Know i have to change out my ac compressor now.
I was told that the ac system wont work to good if i dont change out my ac dryer and expansion valve. does anyone know if that is true??
if its true do you know if the expansion valve can just be cleaned with a special cleaner??

thanks

Last edited by memario213; 07-28-2005 at 02:27 AM.
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  #6  
Old 07-28-2005, 08:55 AM
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The dryer needs to be changed every time the system is opened to the atmosphere. It absorbs any residual moisture inside the system. If too much moisture is in the system it'll form acids that'll eat the insides of the system over time.
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Old 07-28-2005, 08:55 AM
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Quote:
Originally Posted by memario213
I found ac tag its located under the hood on the left side its green. it says R-134

Know i have to change out my ac compressor now.
I was told that the ac system wont work to good if i dont change out my ac dryer and expansion valve. does anyone know if that is true??
if its true do you know if the expansion valve can just be cleaned with a special cleaner??

thanks
Expansion vavles are cheap and frequent source for leaks....

The reciever/dryer MUST be replaced any time the system is opened ot outside air...
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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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  #8  
Old 07-28-2005, 09:08 AM
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Location: Baton Rouge La
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When I was buying my CE, I was told the system had a slow leak and dreaded that it might be the evaporator.

They put dye in it and turned out to be o-ring leaks around the expansion valve. I split the cost with the seller and have ice cold air.

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