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

Closed Thread
LinkBack Thread Tools Display Modes
Old 09-23-1999, 08:48 AM
Posts: n/a
I have 1988 300e that gets warm when idling or in slow and stop and go driving. Fluids okay. Do I start with water pump or what else to investigate. Thanks for any input.

Old 09-23-1999, 09:27 AM
Posts: n/a
The fan viscous may be the problem as well as a plugged radiator or even a t-stat.
Check the radiator by running the engine till warm then shutting off the engine and feeling the engine side of the radiator for "cold spots". If present, replace the radiator. Check the viscous by running the engine and raising the engine speed for 40-50 seconds. The engine fan should increase and decrease in speed when the viscous engauges and disengauges. The thermostat is a good item to replace just for good insurance.
good luck
Turbo herb
Old 09-23-1999, 09:37 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
Also be sure to inspect the aux fan for proper operation! They blow fuses often and if you run the A/C, the engine will run on the warm side with no aux fan.

1987 16V

Old 09-24-1999, 06:57 PM
Posts: n/a
To all. I have bad experience with water pumps. My wife had a Toyota which she bought brand new. After a couple years during scheduled service at the dealershop someone replaced coolant with Presto or some other stuff. The result... water pump blew up two years later at 50k miles. The same with my MB. Previous owner filled the cooling system with this green stuff. The result... the water pump blew up. You should see it how rusted it was.

Word of advice! Don't save money on coolant. Even if you service your car at the dealer insist on filling up with original coolant.
Old 09-24-1999, 10:03 PM
Registered User
Join Date: Jun 1999
Location: Los Angeles, Calif, USA
Posts: 521

I saw a water pump having the shaft came off while driving due to a worn-out bearing. The car was only 32000 miles old. The premature failure of water pump mostly caused by unbalanced fan or the fan belt adjusted too tight. On the older car, after a radiator flush, the water pump sometimes starts leaking. Was your water pump actually "blew up" sending pieces everywhere?

Per one of the MB service bulletins issued a while back, the engine may get very hot (I do not remember the tempurature reading) in slow traffic and it is normal as long as the cooling system is in good condition (proper mixture, pressure, coolent level, air flow, coolent flow, etc.)


Closed Thread


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
Checklist: PS Pump Re-Seal EricSilver Tech Help 29 07-15-2007 11:35 AM
Auxillary Water Pump Inline Fuse MVK Diesel Discussion 12 01-22-2004 11:52 PM
300E leaking coolant near water pump mike690003 Tech Help 4 08-04-2003 07:30 AM
1986-190 E: Thermostat and water pump Greg Rivera Tech Help 2 11-07-2002 07:15 PM
Just a hose, or the entire water pump? [190e 2.6] mradowic Tech Help 1 06-26-2002 02:23 PM

All times are GMT -4. The time now is 12:09 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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