Dick:
There is a way to do it with no teardown.
1. Remove all the spark plugs
2. Insert a 3-4" bolt with the same threads as the spark plug into
the #1 cylinder
3. Rotate the crank clockwise until the bolt stops the crank. Mark
the location of the
timing pointer on the crank pulley.
4. Rotate the crank counter clockwise until the bolt again stops the
crank. Mark the location
of the timing mark on the pulley.
5. TDC will be exactly halfway between the two marks you made.
You will probably want to play with how far you insert the bolt. You
want the crank to stop
within 10-20 degrees of TDC both times for maximum accuracy.
Vance
-----Original Message-----
From: tr6taylor@webtv.net [mailto:tr6taylor@webtv.net]
Sent: Tuesday, May 07, 2002 11:53 PM
To: gln@worldpath.net
Cc: 6pack@autox.team.net
Subject: Re: Top Dead Center
Nick---Triumph Repair Manuals show how to do find TDC properly, and if
you're building a killer engine and need to know exactly where it is,
it's best to follow the proceedure. IF all you want to do is see if it's
close enough to use the crank pulley timing marks, some teardown is
necessary. The key in the crankshaft will be straight up at TDC. If you
want to go so far as to remove the head, TDC can be found with a degree
wheel and a dial indicator on top of #1 or #6 piston, as explained in
the Bentley Book.
Do you have a reason to believe yours is not accurate?
Dick
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