The "naked" aluminum will stand up to the heat just fine. The added coating may
even be detrimental to heat transfer. I'm not surprised that the powder coating
is discoloring.
________________________________
From: Healeys <healeys-bounces at autox.team.net> on behalf of Bruce Steele
<healeybruce at roadrunner.com>
Sent: Monday, February 20, 2017 5:55:32 AM
To: 'Healey List'
Subject: [Healeys] Intake manifold finishes
I?m interested in my options for finishing my intake manifold. It was powder
coated clear 12 years ago, and the coating has yellowed at the head flanges
from heat, and over the years what look like rust spots have developed in the
powder coat, which is odd since the manifold is cast aluminum (see the attached
photo).
I?d prefer to preserve the natural cast aluminum color, and I?m not a big fan
of the chrome or polished look on the intake (my apologies to all you out there
with nice shiny intake manifolds?it?s just not my taste). I had the exhaust
manifold Jet-Hot coated in a cast iron gray 12 years ago, and they still look
great. So, Jet-Hot coating the intake is one option, but the color samples
they sent me of their lightest grays are all at best a medium gray; all
considerably darker than their online color catalogue indicates. I?m going to
call them Monday, but I?m not sure they have a coating light enough.
I also don?t want to paint it, as I know that won?t hold up long term. I?m
curious about blasting the clear powder coat off and leaving the manifold
uncoated. How does the ?naked? aluminum hold up to the heat? What have others
done? Your experience is appreciated.
Bruce Steele
Brea, CA
1960 BN7
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