From digest.v6.n875 Sat Jul 12 17:10:40 1997
Date: Sat, 12 Jul 1997 07:50:03 -0400 (EDT)
Subject: <misc> extended life antifreeze
I've noticed lots of 'digesters' recommending the various entended life
antifreezes. Before you put the stuff in your cars, you should dig a little
deaper and get recommendations from your vehicle manufacturer. As far as I
know, GM is the only manufacturer that condones their use. Chrysler, as a
way to beat the system, uses the orange dyes, but with regular antifreeze, in
their new vehicles. Renault and Volvo, in Europe anyway, say that it should
not be used in their engines. I don't know BMWs official position.
Problem is with water pumps that cause cavitation (vacuum formation) which
most water pumps do. Cavitation, by itself is suspected to cause pitting
but, when coupled with certain components in the extended life antifreeze,
causes significant impeller pitting, significantly decreasing pump life.
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