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1. 12:52 AM - Re: Re: (James, Clive R)
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A bit of slack is never a bad thing with valve clearances, IMHO.
The temperatures transients mean things expand at different rates so as
the engine warms cleances will move all over.
I've always used 12 thou, my main concern after valve seat problems with
the early heads was to make sure the vales seated well and not how far
they opened.
My way:
With the one valve depressed the other tappet should rattle nicely and
the just stop (rattling) with a 12 thou feeler gauge under it.
Seldom did I make any adjustments even with the old soft ally bendy
heads.
Chasing a few thou is a waste of time, means you are tweaking aduster
unnecessarily and several failures have been from broken adjusters.
CJ
________________________________
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
Robert Rivard
Sent: 15 April 2010 21:51
Subject: Re: JabiruEngine-List: Re:
Thanks Lynn
Sounds good to me
BOB
--- On Wed, 4/14/10, Lynn Matteson <lynnmatt@jps.net> wrote:
From: Lynn Matteson <lynnmatt@jps.net>
Subject: JabiruEngine-List: Re:
To: jabiruengine-list@matronics.com
Date: Wednesday, April 14, 2010, 1:45 PM
<lynnmatt@jps.net
<http://us.mc826.mail.yahoo.com/mc/compose?to=lynnmatt@jps.net> >
I think what you may be encountering is that when you have the
other valve fully depressed, the valve spring forces the camshaft away
from its otherwise "neutral" position, causing the adjacent valve
clearance to increase. I never thought about this before you mentioned
it, but to me it is a possibility. This points out that the cam is
floating in about .002" of oil, eh?
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 910.3 hrs (since 3-27-2006)
Countdown to 1000 hrs~89.7 to go(101 days to go)
Sensenich 62"x46" Wood (summer)
Electroair direct-fire ignition system
Rotec TBI-40 injection
Status: flying (and learning)
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