My foundry guy does not think so. Since the side housing temp rarely
exceeds 250 F we are not worried. Also Mazda does the same thing
on the rotor housings. If you look closely you will see a thin
steel insert in the rotor housing casting that is then chrome plated.
Chrome plating over the steel insert is one of our options.
Chrome plating over aluminum is known to cause problems.

Paul Lamar

Hans Conser wrote:

Paul, you know that the newer rotor housings are not chrome plated
right?   They are teflon plated.  The steel insert seems to be a mesh
too, like chicken wire.

Hans Conser

PS  Keep up the good work on the aluminium end housings.

Are you sure they are not chrome plated? Are they shinny?
The teflon coating has been used for quite some time over the chrome to enhance
the break in period and improve the initial emissions and fuel 
consumption. It soon wears away. The steel inserts used
have a serrated surface that was partially rolled over causing
it to lock with the aluminum die casting. Is that what you are
referring too? If not do you have any pictures?


Paul Lamar
 
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