View Single Post
Old 10-09-2003, 01:08 AM
RunningTooHot's Avatar
RunningTooHot RunningTooHot is offline
Registered User
Join Date: Aug 2000
Location: Here
Posts: 775
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”.)


Current rolling stock:
1992 500E 217,000+
1995 E300D 410,000+
1998 E300D 128,000 (New Toy!)

Non-rolling stock:
1992 400e / Bornite w/ 177,000 - needs harness

Prior MBZ’s:
1952 220 Cab A
1966 300SE
1971 280SE
1973 350SLC (euro)
1980 450SLC
1980 450SLC (#2)
1978 450SLC 5.0 (sold her - sniff, sniff)
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 01:55 AM.
Reply With Quote