Auto Lash Adjuster - Daewoo G424 Gasoline Service Manual

Auto Lash Adjuster

Construction
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.
G424 Service Manual
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.
(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.
(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.
27 Engine System