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 10-23-2001, 10:31 PM
Registered User
 
Join Date: Jan 2001
Location: Tucson, Arizona
Posts: 758
Coolant leak on '86 300E, Is it the pump?

Greetings All,

Once again I am trying to fix the wifes new to her car and there seems to be coolant that runs down the side of the oil pan and onto the ground. I checked out the water pump pulley and there seems to be a lot of slack like the shaft or bearing or both are worn out. I don't physically see coolant coming from the pump but was wondering if the Germans designed their pumps like ours with a hole on the bottom of the front bearing housing so it drips when the pump is in need of replacement I can't see under the pump because of it's placement so if there's something else I am missing, let me know.

Thanks,

Charles
__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan
Reply With Quote
  #2  
Old 10-23-2001, 11:07 PM
MikeTangas's Avatar
Senior Member
 
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
Yes the water pump has a weep hole. Do you see the water start dripping immediately after shutting down? Can you possibly get a small mirror down in the area to see if you can see a "coolant crust" build up around the weep hole, or even see the coolant dripping after shut down?

I'm not certain, but isn't your water pump on the left side of the engine at the lower front of the block? Maybe you could see the weep hole from underneath the car.
__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.
Reply With Quote
  #3  
Old 10-23-2001, 11:21 PM
Registered User
 
Join Date: Jan 2001
Location: Tucson, Arizona
Posts: 758
Can't see under pump

Greetings,

The pump on the 300E is belt driven to the left side of the block (from the back looking forward) and with the solid bracket of the power steering pump extruding under the water pump you can't see under the water pump even from the bottom.


Charles
__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan
Reply With Quote
  #4  
Old 10-24-2001, 01:54 AM
Registered User
 
Join Date: Apr 2000
Location: LEMONT-CHICAGO
Posts: 412
Have fun doing this job. Plan on replacing the tensioner and shock along with the bypass hose on the water pump. You may take a stab at replacing the sealon the upper timing cover while your in there. The job may seem impossible at times especially getting the water pump mounting bolts out. I used strange combinations of tools to get the job done. I had problems with the all of the allen bolts. I ended up using allen sockets held in place by prying them in and turning the allen socket with the box end of a combination wrench. I congratulated myself on a job well done. I took time to detail the engine and replace gaskets and such. It it time consuming, and it may take more than a day at home for a weekend warrior.
__________________
1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T
Reply With Quote
  #5  
Old 10-24-2001, 10:39 AM
G-Benz's Avatar
Razorback Soccer Dad
 
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
I had the same symptoms when the water pump failed (this year) on my 93 300E.

I've since learned to do a lot of work myself, and I understand that it is a frustrating and time-consuming task, but is a DIY job.

I wasn't very sure of my skills then, so I gave the dealer $860 to do the work. You can save over $500 if you do it yourself...
__________________
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
Reply With Quote
  #6  
Old 10-24-2001, 09:58 PM
Registered User
 
Join Date: Jan 2001
Location: Tucson, Arizona
Posts: 758
Just wanted to make sure I was thinking correctly

Greetings and Thanks,

To all that have replied. I just wanted to make sure being as I can't see under the pump from any angle you approach it that there wasn't something else, hose, etc. that could possibly be causing the coolant leak. From a top side view of the water pump it shouldn't be to hard to remove, maybe the back bolt may give me a problem but compared to a Ford Aerostar van with 16 bolts to remove without removing the fan, clutch or radiator, with less than a few inches to work in, this should be a piece of cake. I can't image why I'd have to replace the engine shock mount, front cover seal, bypass hose etc. They all are pretty accessible from what I can see.


Thanks,

Charles
__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan
Reply With Quote
  #7  
Old 10-24-2001, 10:40 PM
G-Benz's Avatar
Razorback Soccer Dad
 
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
The other components mentioned can be replaced without waiting for the water pump to go south...it's just that it's so much EASIER to perform with all that is removed in performing the water pump replacement...minutes instead of hours...can ya dig?

Considering the age of your car, if those parts have not been replaced, they will require attention soon...so why not get it over with since you have to deal with the water pump fiasco anyway?

Just a tip...
__________________
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
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
Coolant Leak: But where's the source Ron in SC ML, GL, G-Wagen, R-Class, Unimog, Sprinter 2 12-02-2004 09:02 PM
Arrrgh! Auxilliary coolant pump leaking..... rwthomas1 Diesel Discussion 20 12-06-2003 01:34 AM
1991 300E Coolant Leak talons40 Tech Help 1 11-18-2003 11:37 PM
Injector Pump Leak (odd place?) bisric Diesel Discussion 1 04-14-2003 11:01 AM
New Alternator, then mysterious coolant leak Doug41 Tech Help 0 11-20-2002 10:22 PM



All times are GMT -4. The time now is 08:16 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page