G424 Service Manual Engine System27
Auto Lash Adjuster
These engines have auto lash adjusters that eliminate
the need for valve clearance adjustment and reduce
noises of the valve system. The auto lash adjuster
automatically absorbs change in the valve clearance
caused by engine temperature change or wear of
parts and adjusts the valve clearance always to zero.
(2) During Valve Lift
A small amount of oil leaks from the high pressure
chamber through a clearance between the body inside
and the plunger outside.
Operation of Auto Lash Adjuster
(1) At Start of Valve Lift
When the cam lifts up the rocker arm, the hydraulic
pressure immediately forces the ball in the high pressure
chamber against the seat, closing the high pressure
chamber.
(3) At end of Valve Lift
The plunger spring forces the body back to the initial
position and oil is supplied to the high pressure chamber
to make up for the leaked oil.
Construction
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