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
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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