[Vwdiesel] RE: [Audi-VW-Diesels] '82 Vanagon diesel water pump belt adjustment woes

[Adrian Snare]

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 Henry, if all that belt does is run the water pump, then its life is soft and
easy. Assure that the contact surfaces are non glazed(another use for the
wonderful scotchbrite)and set up the belt to be no tighter than necessary and
then a little looser. The water pump should have very little drag, if not,
it's suspect.As opposed to an A/C belt(2 -3 mm deflection) I adjust the WP
belt to 5 to 7 mm looseness. Sloppy, but as long as it does not slip, its OK.
The belt should last at least 50k, and the WP, well over 100k. I am certain my
WP is still good at 240 k (thanx to a number of doses of anti rust).   Adrian

----- Original Message -----
From: Henry Jackson
To: Audi-VW-Diesels at yahoogroups.com
Sent: 2/11/02 8:25:51 AM
Subject: [Audi-VW-Diesels] '82 Vanagon diesel water pump belt adjustment woes
I have had SO much trouble keeping the crankshaft / water pump belt adjustment
correct on my 82 diesel westy.  I get the belt tight by removing shims on the
water pump pulley and everything works ok for a few hundred miles, then it
starts slipping.  I've replaced 3 belts (all high quality Bosch) and one even
wore so badly it lost all of it's "wedge" becoming a rubber band.

I first smiled at the ingenious way the VW engineers figured out how to adjust
the water pump fixed solidly to the block with a single belt.  But removing
the correct number of shims is a hit or miss guessing game and is difficult to
do in a tight space.  I try to get it as tight as I can, with maybe 1/8"
available deflection at the midpoint of the belt span.

As far as I can tell the water pump shaft bearings are still good (no leaks or
noise)

Has anyone had similar difficulty and figured out a solution?  Or am I just
not "getting" something and making an obvious mistake somewhere in my "water
pump belt adjustment" logic?

Henry Jackson
82 1.6 diesel Westy
Palo Alto, CA.
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---Adrian the madman
--- adriansnare at earthlink.net[3]


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