<VV> valve adjustment-- MY opinion
BobHelt at aol.com
BobHelt at aol.com
Sat Aug 2 00:55:01 EDT 2008
Tim Colson wrote:
i feel that most failures of the valve seats can be tracked to any signs
of past
overheating or valves adjusted a touch tight (as loose as you can do without
noise is better.......
Tim,
If I read this correctly you are saying to set the valves as loose as you
can without getting any noise. Is this correct?
If so, may I suggest that this is not wise. Because setting the valves loose
means backing off on the adjustment nut after finding zero lash instead of
tightening the nut. That is the only way you can set the valves loose. Since
the internal piston in the lifter is self adjusting to allow for valve train
and engine expansion/contraction you will be eliminating this feature and will
be getting excessive clearance and associated noise and wear at some
temperature.
What really is needed it to accurately find the zero lash point and then to
tighten the adjusting nut about 1/2 turn. This is not critical and can
actually vary from just a slight tightening to a full turn as per some of the shop
manuals. What should be avoided is bottoming the internal piston which will
not allow correct valve operation and will prevent the lifter from self
adjusting to the expansion/contraction of the engine and valve train.
Regards,
Bob Helt
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