Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 05-28-2002, 04:49 PM
Registered User
Join Date: Aug 2001
Location: secret
Posts: 3,044
Question Question for you A/C experts

Is the expansion valve for an R12 system different from one designed for R134? If so, does anybody make one for the 124 model?
Reply With Quote
Old 05-28-2002, 05:14 PM
Registered User
Join Date: Jun 2000
Location: Plano, TX
Posts: 2,513
I think all you can find these days are expansion valves labeled R-134a. They look exactly like the R-12 ex. valve, just have a sticker on the side stating R-134a compatibility. My understanding is the newer valves work fine with R-12. I have an R-134a valve in my 124 with R-406a and it cools great. I'd worry more about getting all four connections to seal tightly than whether it's labelled R-12 or R-134a.
Reply With Quote
Old 05-28-2002, 05:16 PM
Super Moderator
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
Yes, they are different. I couldn't tell if are looking for the R12 or R134 model, but and you can get the latter from a dealer or Mercedesshop for about $40.
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
Reply With Quote
Old 05-28-2002, 06:04 PM
Registered User
Join Date: Aug 2001
Location: secret
Posts: 3,044
I converted over to R134 and the compressor crashed. Put on new compressor and recharged with R134. New dryers on both ocassions. I am about to reinstall the ac after having the engine out and want to get it flushed and recharged. I've heard off debris "clogging" the valve and figured I might as well replace it while I'm at it. I also need to know if there is a 134 pressure switch for the auxillary fan. Mine never worked right after the conversion.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 02:05 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page