Larry, the main reason for shimming the upper tensioner is the head
being planed down. With the tension off the tensioner see if the chain
can touch the upper chain guide on the "down side" of the chain
direction. See Gordon Glasgows web page for a good description of what
you are trying to achieve.
If your head has been planed, you are almost certain to need a shim or
two.
Good luck, Brian Rourke.
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net] On Behalf Of Dziuba,
Larry
Sent: Saturday, February 07, 2004 5:10 AM
To: 'datsun-roadsters@autox.team.net'
Subject: Upper Timing Chain Tensioner - '68 2000
Thanks to all you guys that responded. I have made a brass retainer
plate
to stop the bolts from backing out. It should be thick enough. Someone
commented that I should turn the engine backwards to take the tension
off
the chain to see how much gap exists between the tensioner pad and the
tensioner body. There is lots of gap. I believe you meant for me to
put
tension on the tesioner pad to see how much gap still existed between it
and
the tensioner base. True? The tensioner pad has a 1/8th inch thick
rubber
or soft nylon spacer on it. It looks like the pad could be slamed back
in
to its base when the engine is first turned over. Does a person really
have
to get rid of some of that remaining gap between the pad and base? I
forgot
to mention that the tensioner and timing chain sets are new and included
in
the rebuilt engine. Also, is the tensioner pad supposed to ride against
the
chain all the time? Larry.
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