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Subject:valve adj.: lower compression, valvetrain noise remains
From:Dan Barrett
Date:Sat, 19 May 2012 14:07:59 -0400

Folks:

I'm adjusting the valves on my ten year old Boston Bob 2.1 with about
60,000 mi on it.  I followed Ben's guide
(http://benplace.com/1700valves.htm) and tightened the adjusting
screws 1-2 turns in past zero lash.  This helped a lot, adding 20lbs.
of compression on cylinders 1 and 2, making the engine easier to
start, and idling closer to 900 rpm than it had been.

But, two problems: first, cylinders 3 and 4 lost about 15lbs. of
compression each.  Second, I still have a lot of valvetrain noise from
both sides of the engine.

Do the results on cylinders 3 and 4 mean that I've moved the adjusting
screws too far in and need to back out towards zero lash?  And is the
valvetrain noise just the way things are with a broken-in boxer?

Best,
d.

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