Inspecting Cylinder Head - Mitsubishi 4D68 Workshop Manual

11A-9-4
4D68 ENGINE (E - W) -
Timing belt side
90°
90°
E Mitsubishi Motors Corporation
Cylinder Head, Valves and Valve Springs
(3) Using the special tool (MB991654) and according to the
(4) Loosen all bolts fully.
(5) Retighten the loosened bolts to a torque of 40 Nm in
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(6) Make paint marks on the cylinder head bolt heads and
(7) Give a 90° turn to the cylinder head bolts in the specified
(8) Give another 90° turn to the cylinder head bolts and make
Paint mark
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INSPECTION
CYLINDER HEAD
(1) Before cleaning the cylinder head, check it for water leaks,
(2) Remove all oil, water scale, sealant, and carbon. After
(3) Check for distortion in the cylinder head gasket surface
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Dec. 1996
tightening sequence, tighten the bolts to the specified
torque.
Tightening torque: 90 Nm
the specified tightening sequence.
cylinder head.
tightening sequence.
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
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).
gas leaks, cracks, and other damage.
cleaning the oil passages, blow air through them to verify
that they are not blocked.
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
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not be expected. When