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Date:         Sat, 7 Nov 1998 18:39:22 -0500
Reply-To:     Martin Jagersand <jag@CS.YALE.EDU>
Sender:       Vanagon Mailing List <vanagon@vanagon.com>
From:         Martin Jagersand <jag@CS.YALE.EDU>
Subject:      Re: 82  Diesel Water Pump
Comments: To: vanagon@vanagon.com, dgreen@ICE.LAKEHEADU.CA
In-Reply-To:  <199811072302.SAA06849@cayuga.cs.rochester.edu> (message from
              Automatic digest processor on Sat, 7 Nov 1998 15:11:31 -0800)

> From: GREEN-DANIEL ALLAN <dgreen@ICE.LAKEHEADU.CA> > > Hello all, > I've got a steady coolant drip from what looks like the drip hole at > the bottom of my water pump. Is is best to just replace the pump? > Also, what is the basic procedure for changing the pump because I > have never done it before? Thanks > Dan > 82 diesel

First, check that the leak is really from the water pump. It could be from the thermostat, or from the housing that attaches the thermostat to the pump. The thermostat and housing is the lowest part with the big hose going forward attached to it. Likely the leak can be fixed by a new gasket or new hose.

If it is in fact the water pump, you usually only need to change the outside part (the casting with the impeller and the in-outlets).

Two alternatives:

1/ Pull the whole water pump from above. It's bolted to the block with I think 3 bolts. On top is the alternator and bracket which also need to come off. Problem with this method is that is usually upsets the timing. The injection pump and alt bracket are held together by another bracket. So this method is good to use if you were going to retime anyway.

Once out you can dissassemble the pump and change all gaskets, o-rings, etc.

2/ Pull the impeller casting only from the back side. Quite tight because some of the bolts are behind the intermediate shaft pulley on the block. Then you have to carefully remove gasket remains from the housing, and reinstall a new impeller pump.

Disadvantage of this method is that the o-ring between the housing and block doesn't get renewed.

Make sure you buy a water pump with a cast impeller. New cheapos with stamped impellers have started to appears, but most Diesel owners don't trust these.

When you're at it replace the thermostat. They go bad ever few years anyway. Get a Whaler or Thompson. If you insist on something else search the archives for my post on thermostats a few years ago.

/Martin -- Martin Jagersand email: jag@cs.yale.edu Computer Science Department jag@cs.rochester.edu Yale University

Slow down and visit the VW diesel Westy page: WWW: http://www.cs.rochester.edu/u/jag/vw -------------------------------------------------------------------


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