[6pack] TR6 Combustion Chamber

[Ruffner, James A *HS]

As far as engines are concerned there is a big problem with the leaded gas.
Over time you get major buildup of lead deposits on the valves themselves, not
to mention within the head also.  The exhaust passages can become so coated
that it reduces exhaust flow.  You also get deposits in the compression
chamber that leads to dieseling.
________________________________________
From: Sally or Dick Taylor [tr6taylor at webtv.net]
Sent: Saturday, March 10, 2012 1:18 AM
To: Ruffner, James A *HS; brian@; 'Cregg Cowan'
Cc: '6pack'
Subject: Re: [6pack] TR6 Combustion Chamber

I'm with the group that's never had a problem with valve seat recession.
Approx. 150,000 miles on the engine since tetraethyl was phased out, here in
Ca. in the late eighties.  For those concerned that this could happen to your
engine, know that recession will cause the valve lash to "get smaller". A
check of clearances now and then will confirm this. I don't use any of the
Lead-o-matic juices either. Most (all?) of the 6's come with the Stellite
exhaust valve faces, so that's another plus.

Dick