Correct me if I'm wrong, but I believe the problem with Vanagon water pumps is
in the sealed shaft bearing possibly being undersized for the application.  I
don't think the water side of the pump is the problem at all.
Mark

John H. Rodgers wrote:

> -- [ From: John H. Rodgers * EMC.Ver #2.5.02 ] --
>
> I always understood that the stuff every one calls antifreeze in reality is
> "Coolant" and  coolants were also lubicants for the water pump, and that in
> modern engines the coolants are necessary for the cooling systems good
> health.
>
> John Rodgers
> '88 GL Driver
>
> -------- REPLY, Original message follows --------
>
> Which brings to mind "Water Pump Lubricants," a class of coolant additive
> products I've seen marketed for decades.  I have no idea if they help,
> hinder, or just hit the pocket book.  I've never seen any test data nor much
> of anything written about them.  Does anyone have any information about
> whether or not they help? John
>
>
> --