Removing Cylinder Head Assembly; Removing Valves And Valve Spring; Removing Valve Stem Seal - Mitsubishi Heavy Industries SL Series Service Manual

DISASSEMBLY OF BASIC ENGINE

1.4 Removing cylinder head assembly

When removing the cylinder head gasket, be careful
not to damage the cylinder head or crankcase surface
by tools such as a screwdriver.
(1) Remove the cylinder head bolt.
(2) Remove the cylinder head assembly by lifting it up.
Note: If the cylinder head assembly cannot be removed due
to crimping of the cylinder head gasket, tap the thick
area on the side of the cylinder head using a plastic
hammer to give a shock.
(3) Remove the gasket from the cylinder head.
Note: If there is a cylinder head problem, check the bolts for
tightness with a torque wrench before removing the
cylinder head bolts.

1.5 Removing valves and valve spring

(1) Use a valve lifter to compress the valve spring and
remove the valve lock.
(2) Remove the retainer, valve spring and valve.
Note: Put match marks for easy identification of the
installing position if the valve is to be reused. When
reassembling, do not change the combination of the
valve and valve seat.

1.6 Removing valve stem seal

Grab the stem seal with pliers and remove.
Note: Be sure to replace the stem seal with the new one
when reassembling the valve and valve spring.
5-4
Removing cylinder head assembly
Removing valve and valve spring
Removing valve stem seal