Ed Anderson wrote:

I recieved a phone call from a friend, Vince Hearn, on the West Coast who
has owned and operated an Mazda rotary engine repare shop for over 20 years.
He called me to tell me that upon tearing down an engine that had the new
Extended Prestone (100,000 mile) antifreeze (the orange color stuff) in it
for two years, was found to have evidence of the antifreeze attacking the
coolant seals and gaskets as well as gunk in the coolant system.  He did
some further checking and the information he received was that the extended
type coolant and the older brazing alloy in alluminum radiators may not be
compatible. Inference was that the newer "Plastic" radiators  are
constructed differently with expoxy which I assume does not interact with
the coolant.  Vince also found  pin hole leaks in the radiator which was the
reason for the car being brought in for repairs as it keeps losing coolant..

He strongly suggested that I remove the Extended Coolant and flush the
coolant system.  I have found Vince's info in the past to be on the money
and will remove the coolant from my system.  At Vince's suggestion, I am
passing this info on to the list for your consideration.   He is also
installing a 13B in an RV-6.

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews NC
eanderson@carolina.rr.com

Thanks for the tip Ed and Vince. Perhaps that is the gunk I saw in the
Turbo II water pump. Barrington?

Vince has been on the list for quite some time. Been meaning to stop in
and see him but I never seem to get around to it. Vince please send me your
address again.

Paul Lamar
 
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