David---The valve guides should all be the same diameter, so having it "come
up" wouldn't cause a change in its appearance. You can remove the valve cover
and look between the springs to confirm this movement. Any chance someone made
a special valve guide because of some emergency, and ignored the std. OD?
Could you be looking at an encrusted head bolt?
Dick
-----Original Message-----
From: David A. Schenck
Sent: Monday, June 23, 2008 6:23 PM
To: 6pack@autox.team.net
Subject: [6pack] TR250 Head Problem?
I removed my carbs and intake tonight to replace them with a whole new
freshly rebuilt and polished setup. Once I got everything removed from the
engine I thought I would shine a light in the intake to check on everything.
The first cylinder intake valve appears to be twice as large in diameter as
all of the others. Is it possible that the valve guide has unseated? I had
no indication of any problems with the motor to indicate this. Is this a
simple fix - pop the head off and pop the guide back in place and motor on?
Or am I in big trouble? I have uploaded a picture -
www.triumphowners.com/1302
Any thoughts would be appreciated.
Dave Schenck
'68 TR250
Towson, MD
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