[urq] Water Cooled Turbos

[isham-research.freeserve.co.uk at pop.pol.net.uk]

>  >I'm also happy to send you fragments of wx motor piston rings from
> excessive heat, stock turbos, stock computers (along with the bottom feed
> WGFV you have 'never' seen fail).

> I have had piston damage to my WR due to heat, I believe, but not
> necessarily turbo heat.  I experienced some unusual running tendencies and a
> compression test showed some weaknesses on #5.

> I pulled the head and was surprised to see the piston wall breaking up and
> little bits floating between the rings!  If my rings had failed, the result
> could have been catastrophic.  #1-#4 looked like new. (38K miles)

BR Motorsport had a couple of cases of this a few years back.  Both cars
had been regularly left without being started for long periods - in one
case the owner was retired and spending the wet and rainy months in
Australia, and the other was an airline pilot working away for up to
eight months at a time.  The theory at the time was coolant weepage
from the back wall - the gasket isn't very thick there and water tracks
are common.  We have one club member who spends 10 months a year in
Maui and comes back for Christmas and the New Year - each month either
Roger or I will go down to start his car and heat it through properly.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674