2 for 1
Warm Regards,
Tracy Drummond
PMP | ITIL Service Manager | CISSP | <mailto:bighealey at charter.net>
bighealey at charter.net | 408-394-3444 cell | 408-776-0133 home |
<http://www.linkedin.com/in/tracydrummond>
http://www.linkedin.com/in/tracydrummond
From: healeyguy at aol.com [mailto:healeyguy at aol.com]
Sent: Saturday, March 03, 2012 10:40 AM
To: healeys at autox.team.net
Cc: glemon at neb.rr.com; bighealey at charter.net; timwarduk at aol.com
Subject: Re: [Healeys] Adjusting Valve Rocker Clearance
Folks
Valve adjustment, while very important, is not that complicated. We are
trying to get the valve lash set at factory or aftermarket cam specs while
the lifter is setting on the base circle of the cam lobe. Looking at a AH
six cylinder cam you will see that the base circle is slightly more than 50
% of the cam lobe profile. The lifter contact area with the cam lobe is
minimal even with a badly worn lifter.
Another interesting factoid is that the first lobe on the cam shaft from the
front, cylinder #1 exhaust is exactly 180 degrees off from the last cam
lobe, cylinder #6 exhaust. This fact will make the valve adjustment process
much less time consuming yet be as accurate.
By bumping the starter with valve cover removed it is very easy to get the
last valve spring from the back to completely compress, just watch it as
your pushing the button on the starter solenoid, and then you set the lash
on the first rocker arm from the front. Spin the starter to depress the
second spring from the rear and adjust the rocker on cylinder #1 intake.
Happens to be the second rocker from the front! You continue the process
front to back to until all the valves have been adjusted. By the way don't
get confused when you finish the third cylinder. I don't do the valves in
that order but it makes it easier to keep track. This way you don't have to
find top dead center on the pistons or concern yourself if you are off the
timing mark by a few degrees. You can be off a lot and still be on the cam
lobe base circle but using this method will produce very good results and it
is a lot faster. Works on the 100 four cylinder cars too.
Aloha
Perry
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