[Vwdiesel] NA exhaust valves for a TD head?
dieseltdi at verizon.net
Thu Apr 7 13:20:20 EDT 2005
That was certainly true in the beginning when they were built but now only
one head is supplied for both turbo and NA. I also don't believe that the
head has any sodium in it, only the exhaust valves. Unfortunately over the
years as heads have been built and rebuilt, I think everything has just
gotten mixed up. Hayden
----- Original Message -----
From: "Tim Hicks" <emailastro at yahoo.com>
To: <vwdiesel at vwfans.com>
Sent: Thursday, April 07, 2005 12:11 PM
Subject: [Vwdiesel] NA exhaust valves for a TD head?
> The non-turbo head is cast in aluminum-alloy. The Turbo has a stronger,
sodium-injected alloy. Different materials are also used for the Turbo's
valve seats, the pre-chambers and the turbo's valves made of a special metal
called Resistal and the exhaust valves are reinforced by a plasma spray
during manufacturing process.
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