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-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-16-2012, 10:00 PM
Registered User
 
Join Date: May 2007
Location: WV
Posts: 95
Leaky A/C Evaporator?

My 98 E300 is exhibiting A/C leak symptoms. I have not done the CCU diagnostics but will tomorrow.

At this point when I bought the car it provided me with cool air but not cold. I purchased some R134 and added approx 3/4 can and it blew cold. Therefore I believed that most likely there was a leak. Lasted for a couple of weeks and then was back to mostly ambient temp.

Took it to Midas and they found a leak at the low side schraeder valve. Replaced both high and low valves, evacuated system, recharged with dye. Worked great for approx 2 weeks. Now back to same symptoms, but $212 lighter in the pocket.

Midas rechecked for leaks and couldn't find any, even using UV light. Put car up on lift and I watched them check around trans and couldn't see any hints of a leak. Don't know for sure where drain is for evaporator.

So I am on a personal journey to find the leak. By the way the static pressures were 100 psi high, 100 psi low. With engine off. With engine on and at idle no change. Midas says compressor is bad since clutch was turning but pressures remained the same.

On way home cool air came out of center outlets but others were warm. I believe this is an indication of low refrigerant. In any case I have ruled out the compressor issue at this time because there wouldn't be any cool air at all. Right?

I would like to trace all of the system, but I don't know where to begin. I don't even know how to find the accumulator, expansion valve, or if I can observe the evaporator coil without removing the entire assembly. I just want to find where the leak is to determine if its worth the cost of a repair.

By the way Midas wants $1,550 for compressor, accumulator, expansion valve replacement, and re-charge. I believe I can do it myself with patience, and repair guidance of some sort. Too bad there's no repair manuals for these things.

Any help would be greatly appreciated.

Reply With Quote
Reply

Bookmarks

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 06:03 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page