[Vwdiesel] hydraulic lifters
LBaird119 at aol.com
LBaird119 at aol.com
Mon Feb 9 00:31:06 PST 2009
In a message dated 2/8/2009 8:04:08 PM Pacific Standard Time,
petersenrudy at hotmail.com writes:
> Rebuilt Head, new Valves, Guides, Seals ect., used the old
> Lifters.
>
Did you grind valves/seats? If so then you could've ended up with
too much stem protrusion into the top of the head. Valve sinks into
head farther when ground, then the seat, you end up needing to
take .010 to .020 off the end of the stem so the lifter is at the
correct rest height and isn't holding the valve open. Otherwise
it's probably a dead lifter. Bent valve usually makes for a loose
lifter when the cam is up.
"Bench testing" is pulling the valve cover, turning the cam lobes
up and prying the lifter down with a screwdriver. I tend to prefer to
do it on a warm engine so they're pumped up. If they squash easily
then it's bad. (from somewhere in Bentley).
Loren
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