It would seem to me that aluminum in contact with a copper head gasket,
as in the TR3-4 series, as oppossed to later Fel-Pro Aluminum coated
gaskets would cause a chemical, i.e. battery action and destroy the
copper head gasket over time. Heat cycles and the antifreeze/water
contact at the 'edges' of the compressed gasket would cause galvanic
action. As an example -one uses Zinc and aluminum as sacrificial
Anodes in Underwater Marine running gear and (Aluminum) outdrive
applications.
So I would strongly recommenmd against the use of Aluminum Paint in
TR2-3-4 Head Gasket applications. Proper sequence of Torque will be
fine.
As a note however-with respect to the cooling orifices, as they are
related to the Head Gasket and potential coolant weepage into the
cylinders from 'coroded Head GAskets- a Company called Jaguar has
recommendended the use of Bars leak with every flush and refill of the
coolant system since the 1940's. Since they have built those DOHC 6
cyls, V-12's, and Supercharged 6's and V-8's , which of course none of
us are familar with, their recommendation as SOP is perhaps Noteworthy!
Sherman D. Taffel
TR4 CT40054L AKA
'The TR' and "The Toy'
and 5 other LBC's, OK some are BBC's.
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