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Subject:Re: Diesel water pump pulley diameter
From:Alistair Bell
Date:Sun, 3 Jul 2005 20:58:01 -0700

Thanks Jim for the info.

I have been using the single belt system for 11 years :), but curious
about pulley diameters etc .

idle hands and all that.

ab

On 3-Jul-05, at 8:26 PM, Jim Felder wrote:

Which kind, there are two: one with a 30mm hub, one with a 36mm hub
(distance between holes, center to center).

You have to use a water pump specifically for each pulley.

The 30mm pulley sheave diameter is 115mm.

The 36mm pulley sheave diamteter is 140mm.

The double-belt, double-pulley setup that came stock on most or all
diesel vanagons, that uses the shimmed sheave adjustment, has a rear
pulley or 140, which is belted to the alternator (and uses the
alternator for tensioning) and a front pulley of 115mm, using the shims
and is belted to the outer sheave of the crankshaft pulley.

More often that not, owners have dispensed with the two-belt system and
run a single belt over the crank pulley, water pump pulley and
alternator pulley. I have found this to be more convenient but less
functional than the stock setup.

Jim