Isuzu 3LA, Руководство пользователя

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II. Engine Component Description
U
L-Series Diesel 9
Valve Train
IMPORTANT! Upon reassembly, make certain
that all rocker springs are installed in their
correct location. Also ensure that the oil galley is
not blocked when applying liquid gasket.
L-series engines use individual rocker arms
mounted on a common shaft. The rockers and
shaft are mounted inside the rocker bracket
assembly. Both components can be removed
for servicing by simply removing the balance
shaft’s retaining plug at the rear of the bracket.
Before disassembly, note the positioning of the
left and right offset rocker arms. Off-setting
the rocker arms straightens out the push rod
angle. It also helps move the push rod end of
the rocker arm away from the bracket area to
eliminate rocker to bracket contact.
During disassembly, difficulties removing the
shafts may be experienced. This is due to the
slight interference fit in the bracket holes,
which may be compounded with varnish or
sludge build-up on the shaft.
NOTE: During reassembly, special care
must be taken to properly seal the rocker
bracket assembly. Since this is the intake
manifold, improper sealing will result in
excessive oil consumption.
The rocker shaft is oil pressure fed through a
galley machined in the cylinder head. This
galley intersects with the main oil galley in the
block to provide full pressure oiling to the
rocker arms.
Important: When replacing the head
gasket, be sure that the oil hole in the gasket
is aligned correctly with the oil galley in the
block. Failure to do so will prevent oil from
reaching the rocker shafts.
The head gasket is available in one thickness
only.
Do not seal oil galley
with liquid gasket.