RE: [Chrysler300] 300F Water Pump

["Henry Schleimer" <henry.schleimer@xxxxxxxxxxxxxxx>]

Is there more than one pump that bolts up and are you buying the right one?  If the impeller was 3/16” deeper into the housing, it might cause these problems.

 

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Thomas Cox
Sent: Wednesday, 10 November 2010 4:51 AM
To: chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] 300F Water Pump

 

  

I traveled to the Chicago meet in my F convert, during which I threw at least 
two water pump belts. Upon arriving in Chicago, several guys that know a lot 
more than I do about the F engine noticed that the fan pulley was not lined up 
with the crank pulley. All suggested shimming out the fan  pulley which we did 
by about 3/16”. I drove home and all seemed well; no belts thrown and car ran 
fine.
 
After arriving home, the engine was properly broken in and I began to increase 
the speeds I drove. Shortly thereafter, the water pump failed as I slowed down 
from about 4,000 rpms. I did have another water pump in the trunk and I replaced 
it. 

 
Within 50 miles, that water pump failed while driving about 60 mph on the 
interstate, taking out the radiator. 

 
So, I bought a NAPA replacement water pump, replaced the water pump with failed 
bearings, had the radiator repaired and installed, cranked it up and it idled 
nicely for about 30 minutes, at which time I shut it down. Upon start-up, the 
new NAPA water pump failed.
 
I am at a loss at what to do. The belts are not too tight. My only thought is 
that shimming out the water pump may have put too much stress on the water pump 
with a fairly heavy fan/clutch assembly. Any other suggestions?? I can’t afford 
another radiator rebuild and I am afraid to drive the car any distance. I can’t 
understand why I could drive the car nearly 1,000 miles with the shimmed out 
pulley, yet I can’t keep a water pump operating without the bearings failing. 
Help!!!

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