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 02-20-2002, 10:44 AM
Registered User
 
Join Date: Nov 2000
Posts: 168
Aux. water pump, What's it's purpose?

Could someone please tell me what the purpose of the auxillary water pump is? When should it come on? What if it doesn't? Any help would be appreciated. thanks, andy

Reply With Quote
  #2  
Old 02-20-2002, 12:43 PM
mikemover's Avatar
All-seeing, all-knowing.
 
Join Date: Aug 2001
Location: Atlanta, GA
Posts: 5,514
It was my understanding that the aux. water pump is supposed to ensure that coolant gets to the heater core at lower RPMs, so that you have heat when the car is idling.

Mike
__________________
_____
1979 300 SD
350,000 miles
_____
1982 300D-gone---sold to a buddy
_____
1985 300TD
270,000 miles
_____
1994 E320
not my favorite, but the wife wanted it

www.myspace.com/mikemover
www.myspace.com/openskystudio
www.myspace.com/speedxband
www.myspace.com/openskyseparators
www.myspace.com/doubledrivemusic
Reply With Quote
  #3  
Old 02-20-2002, 02:49 PM
mplafleur's Avatar
User Friendly
 
Join Date: Sep 2001
Location: Lathrup Village, Michigan
Posts: 2,939
That is also my understanding. At idle, waterflow is not sufficiant. In my '75 300D, which does not have an aux pump, I used to rev the engine every once and a while to get heat out of vents while my wife and I parked at the ski slopes and watched the skiers at night.
__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

Reply With Quote
  #4  
Old 02-20-2002, 03:22 PM
Fimum Fit
Guest
 
Posts: n/a
Trust the two Mikes

The Florida fellow must be confused by the many front-drive cars which have a circuit to turn on the electric cooling fan when the ignition is off if underhood temperatures create a possibility of vapor lock.
Reply With Quote
  #5  
Old 02-20-2002, 05:21 PM
Fimum Fit
Guest
 
Posts: n/a
Thank You, TK, I leaned something new,

at least about 124 cars -- I've got a 123 Diesel ('85 300TD) and I wonder if it's true of them too (mine has never been over 85 on the temp gauge)? I'll have to try to make my new CD manual work this weekend and find out, but I've been having trouble getting it up and running.
Reply With Quote
  #6  
Old 02-20-2002, 05:26 PM
moedip
Guest
 
Posts: n/a
To: Fimum Fit - if your CD is browser based like mine. A little hint - mine worked erratically or not at all. To make long story short - read the readme text on the CD. I already had Acrobat 3.0 installed when I installed Acrobat 4.o off the cd. They conflicted. Removed both versions and re-installed Acrobat 4.0 from cd and all is well.
Reply With Quote
  #7  
Old 02-21-2002, 07:41 AM
Registered User
 
Join Date: Jun 2001
Location: Omaha, NE
Posts: 962
Andy,
The other issue is that if your aux water pump draws too much current (I don't remember the specs), it will eventually fry your pushbutton climate control panel. If you think yours is not working properly, it would be good to get those specs and test the current draw to avoid collateral damage.

__________________
Steve
'93 400E
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Radiator blew up Scott98 Diesel Discussion 15 02-24-2004 07:57 PM
Do I need the drain tube when replacing a OM603 water pump The Bob Diesel Discussion 2 10-21-2003 08:23 PM
300E leaking coolant near water pump mike690003 Tech Help 4 08-04-2003 07:30 AM
190e 2.6 auxilliary water pump problem. Darin Darlingto Tech Help 4 03-28-2002 08:22 PM
Water pump bypass line (or “vent line”) – what is it’s purpose? RunningTooHot Diesel Discussion 0 07-08-2001 02:47 PM



All times are GMT -4. The time now is 03:28 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