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RE: * TR3 Valve Timing *

To: <triumphs@autox.team.net>
Subject: RE: * TR3 Valve Timing *
From: "Randall Young" <Ryoung@navcomtech.com>
Date: Sat, 24 Apr 2004 21:52:59 -0700
> The manual says rotate the engine (no direction specified) until any
> cylinder has valves at rock or something like that.  I think it means when
> they are both about to move.  Then rotate the engine one full turn and
> adjust the valves.  I wish I had my Haynes manual and did not
> have to bring
> up what is surely a common and over used subject.

With the crank at TDC for #1 (which is also TDC for #4), the valves for
either #1 or #4 should be "on balance", ie both open by the same amount (for
a stock camshaft).  To check this, set the clearances to about .025" (exact
value is not important, but must be the same for both valves) then use a
feeler gauge to check the clearance with the crank at TDC.  Should be equal
for both valves, but it's OK for the intake clearance to be a few
thousandths smaller than the exhaust (which represents advanced cam timing).

If you're really anal, you'll want to double check the TDC mark too ... See
http://www.iskycams.com/degreeing.html for more details (skip down to
"FINDING T.D.C. ON YOUR HARMONIC DAMPER WITHOUT DEGREE WHEEL").  If the head
is on the engine, you can make a positive stop by breaking the ceramic out
of an old spark plug, and threading the shell for a suitable bolt.

Randall





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