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 10-09-2003, 02:08 AM
RunningTooHot's Avatar
Registered User
 
Join Date: Aug 2000
Location: Here
Posts: 822
Question Theoretical question regarding water pump wear…

Has anyone ever run across a situation where a water pump has ended up with reduced pumping capacity due to the vanes becoming worn down from erosion (not corrosion) at high mileage? My water pump is original with almost 325,000 miles – believe it or not!

I am starting to suspect that the pump may not be displacing as much water as it should, but I don’t want to pull the pump just to inspect it; if I can rule out this possibility, it could save me some potentially unnecessary work. (I was thinking about replacing the pump just as a matter of course, but it’s not leaking – and I’m thinking about the old adage “if it ain’t broke, don’t fix it”.)

Thanks!

Glenn
__________________
Current rolling stock:
1992 500E 217,000+
1995 E300D 412,000+
1998 E300D 155,000+
2001 E320 227,000+
One big Japanese 4wd box on wheels. (How the hell did that happen???)

Prior MBZ’s:
1952 220 Cab A
1966 300SE
1971 280SE
1973 350SLC (euro)
1980 450SLC
1980 450SLC (#2)
1978 450SLC 5.0
1984 300D ~243,000 & fondly remembered
1993 500E - sorely missed.
1975 VW Scirocco w/ stroked, slightly de-tuned Super-Vee engine - Sold after 30+ years of ownership

Last edited by RunningTooHot; 10-09-2003 at 02:55 AM.
Reply With Quote
  #2  
Old 10-09-2003, 05:08 AM
Registered User
 
Join Date: Jun 2002
Location: Monrovia, CA
Posts: 490
At that high a mileage, I'd replace the water pump as a matter of course and chalk it up to preventive maintenance. Just one less thing to worry about on a long trip. I'm not sure if the rotor can erode enough to diminish output, but the only way you can rule it out for sure is to pull the pump and measure the clearances. At that point you might as well replace the pump. After 325K mi., I think you've gotten your money's worth out of it. If it ain't broke, and it's seen a lot of miles, replace it before you have to fix something more expensive!

Gary
Reply With Quote
  #3  
Old 10-09-2003, 10:46 AM
I told you so!
 
Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,790
I rather doubt ANY erosion can take place on a water pump vane unless there is abrasive debris in the cooling system. I'm surprised the seal has held up this long.

If you're suspecting poor cooling performance, a likely cause is mineral buildup in the radiator. I've heard there are boiling techniques and rodding techniques to rejuvenate a radiator.
__________________
95 E320 Cabriolet, 140K
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 05:53 AM.


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