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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-18-2013, 05:22 PM
Registered User
 
Join Date: Apr 2013
Posts: 3
Late '94 W124 E420 monovalve

Hello All,
Wondering if anybody out there has rebuilt/repaired the monovalve on a late E420 and wants to share the experience - local dealer wants $396.00 for a new one and it has to be ordered.
I removed the top (1 connector, 4 Torx 10 long screws and 1 heater hose clamp) and saw the deteriorated rubber seal/diaphragm. Solenoid tested good.
It's getting warm in Richmond. Any help will be greatly appreciated!
Reply With Quote
  #2  
Old 04-18-2013, 09:16 PM
Registered User
 
Join Date: Jul 2001
Posts: 897
Hi JC, if you do a search on monovalves, you will find many hits. Unfortunately I don't think there is any magic repair on this one, despite many wishes for this - I don't think you can buy just the diaphragm or plunger with diaphragm. On older BMW's with basically the same monovalve type setup, you can buy just that piece fix things relatively cheaply.

Anyway, have a search and you may get some other inspiration for a bypass, etc. Or maybe I've overlooked an easy fix someone has found, it's been a long time since I looked at this.

Rgds,
Chris W.
'95 E300D, 391K
__________________
Objects in closer are mirror than they appear.
Reply With Quote
  #3  
Old 04-19-2013, 03:34 AM
Registered User
 
Join Date: May 2007
Location: Arizona
Posts: 757
Maybe this is what you are looking for:


How I fixed my duovalve (W210), got my heat back and saved myself $250!
__________________
1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles
Reply With Quote
  #4  
Old 04-19-2013, 04:41 PM
Registered User
 
Join Date: Apr 2013
Posts: 3
Heat is back from side vents

Just replaced the mono heater valve ($300 + for a MB OEM part). Started the engine and set the A/C to 65 degrees (it's 85 outside) and it worked as it should; cold air from all vents.
Turned ignition off, went inside the house, came back and started the engine and drove 4 blocks. Heat is again coming out of side vents Any suggestions?
Reply With Quote
  #5  
Old 04-19-2013, 09:59 PM
Registered User
 
Join Date: Feb 2007
Location: los angeles
Posts: 590
ive got a mono valve from an 94 e320 wagon if you want to try and rebuild it, i replaced mine because heat was coming from sides when ac was on , the new one fixed that issue , i saved old part
Reply With Quote
  #6  
Old 04-20-2013, 03:20 PM
Registered User
 
Join Date: Apr 2013
Posts: 3
Bit the bullet and bought a new valve. Problem solved!
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 06:04 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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