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4D68 ENGINE (E- W) -
Cylinder Head, Valves and Valve Springs
11A-9-4
(3) Using the special tool (MB991654) and according to the
tightening sequence, tighten the bolts to the specified
torque.
Tightening torque: 90 Nm
(4) Loosen all bolts fully.
(5) Retighten the loosened bolts to a torque of 40 Nm in
the specified tightening sequence.
(6) Make paint marks on the cylinder head bolt heads and
cylinder head.
(7) Give a 90° turn to the cylinder head bolts in the specified
tightening sequence.
(8) Give another 90° turn to the cylinder head bolts and make
sure that the paint mark on the head of each cylinder
head bolt and that on the cylinder head are on the same
straight line.
Caution
D
If the bolt is turned less than 90
°
, proper fastening
performance may not be expected. When
tightening the bolt, therefore, be careful to give
a sufficient turn to it.
D
If the bolt is overtightened, loosen the bolt
completely and then retighten it by repeating the
tightening procedure from step (1).
INSPECTION
CYLINDER HEAD
(1) Before cleaning the cylinder head, check it for water leaks,
gas leaks, cracks, a n d other damage.
(2) Remove all oil, water scale, sealant, a n d carbon. After
cleaning the oil passages, blow air through them to verify
that they are not blocked.
(3) Check for distortion in the cylinder head gasket surface
using a straight edge and thickness gauge. If distortion
exceeds the specified limit, replace the cylinder head.
Gasket surface distortion
Standard value: 0.05 mm or less
Limit: 0.2 mm
PWEE9609
E
Dec. 1996Mitsubishi Motors Corporation
DEN0781
Timing belt side
6AE0297
90
°
Paint mark
90
°
DEN0794