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 09-18-2003, 10:10 PM
shoe's Avatar
Senior Member
 
Join Date: Jun 2000
Location: Baton Rouge, LA.
Posts: 583
Preglow Engine Coolant Temperature Sensor

On my 96 E300D anyone know where the preglow engine coolant temp sensor is located? I have a component locator and it appears to be near the thermostat housing. I cant find it there, any help would be appreciated.
__________________
Keith Schuster
2006 E350 98K miles
2013 Ford Explorer 15K miles
Reply With Quote
  #2  
Old 09-19-2003, 05:22 PM
shoe's Avatar
Senior Member
 
Join Date: Jun 2000
Location: Baton Rouge, LA.
Posts: 583
Somebody has to have a clue!!!
__________________
Keith Schuster
2006 E350 98K miles
2013 Ford Explorer 15K miles
Reply With Quote
  #3  
Old 09-19-2003, 07:40 PM
Registered User
 
Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Keith:

Temp sensor for the glow plugs is probably in the glow plug relay on the driver's side fender, not on the engine. At least it is on the 603 engine. Senses ambient temp only, so the GPs will run even with a hot engine.

Peter
__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
Reply With Quote
  #4  
Old 09-20-2003, 07:38 PM
shoe's Avatar
Senior Member
 
Join Date: Jun 2000
Location: Baton Rouge, LA.
Posts: 583
Peter,

I agree there is probably one in the controller. However, the component locator I am referencing is from Star Tek Info. http://www.startekinfo.com/StarTek/ (Mercedes sponsored) clearly shows two engine coolant sensors, one for the gauge and one for the GP's. The one for the gp's apears to be a three wire affair. I keep getting a check engine light and a code of P0308 which indicates a problem with the glow plug system. Since the car has no problem starting I am suspecting teh coolant sensor may be giving a bad signal intermittantly. I want fo find the sensor referenced in the literature I have and take voltage readings and compare them with what the factory asys they are supposed to be.
__________________
Keith Schuster
2006 E350 98K miles
2013 Ford Explorer 15K miles
Reply With Quote
  #5  
Old 09-20-2003, 08:54 PM
Registered User
 
Join Date: May 2003
Location: Long Island, NY
Posts: 83
The glow plugs failed to come on on my '93 300SD at 50,000 mi. It was due to a faulty temp sensor. It is located on the cylinder head just behind the second glow plug. mine is light green in color. It was not easy to change. Yours will probably be more accessable being that you don't have a turbocharger.
Reply With Quote
  #6  
Old 09-21-2003, 11:07 AM
shoe's Avatar
Senior Member
 
Join Date: Jun 2000
Location: Baton Rouge, LA.
Posts: 583
Thanks, I will have to pull the intake off but that is not a big deal. Do you think a faulty temp sensor would make the GP's come on after the car up to running temp? it has done that a couple of time right before the CEL has come on, actualy the CEL came on when the GP light comes on after the car has reached normal operating temp. It will stay on for a couple of minutes. Then I have to reset the CEL.
__________________
Keith Schuster
2006 E350 98K miles
2013 Ford Explorer 15K miles
Reply With Quote
  #7  
Old 09-21-2003, 01:54 PM
Registered User
 
Join Date: May 2003
Location: Long Island, NY
Posts: 83
Your dashboard indicators are obviously different from my '93 300SD. If there is a malfunction of the glow plug system on my car the glow plug light comes on for a few seconds just after the engine starts, never after it warms up. The check engine light has never come on for any reason in the 8 years that I have owned this car

You may have a problem beyond the sensor. I would be suspicious of the engine wiring harness. You could be given a false warning indication due to wires that are shorting out or grounding intermittently. Since your car seem to start normally I would suspect that the sensor is OK. My car has 66,000 mi. on it and I have noticed cracked insulation both longitudinal and radially. However it has not ben a problem. Mercedes has made a repair harness available just for the engine compartment for most '92 to about '96 models which had the troublesome wiring.
Reply With Quote
  #8  
Old 09-21-2003, 04:50 PM
shoe's Avatar
Senior Member
 
Join Date: Jun 2000
Location: Baton Rouge, LA.
Posts: 583
Yes, mycar is OBDII compliant therefore the glow plugs are covered in the emmisions circuitry. I will give the wiring a look the next time I am under the hood.
__________________
Keith Schuster
2006 E350 98K miles
2013 Ford Explorer 15K miles
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 05:36 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