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RE: Crud in Exhaust Manifold

To: "triumphs@autox.team.net" <triumphs@Autox.Team.Net>
Subject: RE: Crud in Exhaust Manifold
Date: Tue, 28 Sep 2004 10:22:32 -0700
> Hi guys,    Im about to send my late model exhaust manifold(76 TR6) with
> the air injector tubes out for ceramic coating.  I noticed that in some
> runners where the tubes exit the manifold, there is a putty like hard
> substance.  It's white inside and coated with soot on the outside.
> There's also some of this inside where the manifold connects to the
> exhaust pipes.  Is this something that should be there or can I chip
> this out?  Is it there to seal those tubes somehow.  Its only in a
> couple of the runners but it must really restrict flow.    Any Ideas
> what this is?

Just a WAG ... sounds like lead oxide left behind when the engine was run on
leaded fuel.  I'd be very careful about ingesting/breathing it ...

Randall

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