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

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-21-2002, 06:36 AM
Registered User
 
Join Date: May 2000
Posts: 317
What sensor is this?

Can someone identify this sensor for me? It's the first sensor on the cylinderhead of a 86 300E, it's red in color, has two prongs and it looks like vacuum lines connect to it. The reason that I ask is, one of the prongs broke and I need to replace this sensor..
__________________
Richie
1986 300E
Reply With Quote
  #2  
Old 05-21-2002, 08:09 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
That is a "thermo-vacuum" valve! At 50C this valve allows vacuum to pass thru. Part number is 000-140-71-60 OR 000-140-72-60.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 05-21-2002, 08:22 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Thermo-valve for fuel vapor purging (red, 50deg C).

This valve, which is closed below 50deg C, transmits vacuum at all throttle positions above idle to the purge valve which allows fuel vapors which have been gathered in the charcoal canister to be pulled with air into the intake for burning. The thermo valve is a temperature controlled on/off switch to the purge vacuum control signal.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #4  
Old 05-21-2002, 09:39 AM
J.HIDALGO's Avatar
Registered User
 
Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
Interesting!

What symptoms would the car have if it is malfunctioning, if any?
Thanks!
__________________
J.H.
'86 300E
Reply With Quote
  #5  
Old 05-21-2002, 10:32 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Its conceivable that an unpurged charcoal cannister could reach its dew point and leak raw fuel. Probably would be so slight that all that would be noticed would be the fuel smell (which is the purpose of the system in the first place).
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #6  
Old 05-21-2002, 09:21 PM
Registered User
 
Join Date: May 2000
Posts: 317
Thanx for the replys
__________________
Richie
1986 300E
Reply With Quote
  #7  
Old 10-11-2002, 06:34 PM
pmizell's Avatar
Benz Zealot
 
Join Date: Jun 2001
Location: Houston, Texas
Posts: 838
Hello board:

Does anyone know the location of the thermovalve on later M103's? ('91) It has been modified to 70c and MOVED from front of head to unknown location. In place of former thermovalve on my engine head is the coolant bleed screw. CD's and search are of no help.

TIA!
__________________
-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi
Reply With Quote
  #8  
Old 11-10-2007, 06:37 PM
Registered User
 
Join Date: Sep 2005
Location: JAX, FL
Posts: 140
thermovalve?

84 380 SE
i've got a fitting into the engine about 3" to the left of the idle air control valve. the fitting has two small red vacuum line tits and no electrical connections. the tit for the line that goes to the back of the idle air control valve is broken off. small vacuum hose to ICV has been plugged with a BB. Would this explain poor engine idle when engine is cold? Engine seems to run fine when warmed up. Is this a thermovalve or just a fitting for engine vacuum? does anyone have a part number, can't seem to find it on-line.
__________________
65 190d sold
85 380SE sold
87 560 SL 180K
84 380SE 96K (mint)
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 12:31 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