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Service Manual Mitsubishi SL-Series diesel engines
Version 08/2004
VALVE CLEARANCE
ENGLISH
MAINTENANCE
MAINTENANCE
48 VALVE CLEARANCE
1. Slightly loosen the cylinder head bolts and
retighten them to the specified torque in number
sequence.
2. Find top dead center compression position for No.
1 piston by using the procedure that follows:
a Turn the crankshaft until TDC mark on the
crankshaft pulley is aligned with the mark on
the timing gear case.
b With No. 1 piston at top dead center on the
compression stroke, the rocker arms will not
be moved when the crankshaft is turned
approximately 20° in both directions.
c If the rocker arms move, No. 1 piston is at top
dead center on the intake or exhaust stroke.
In such a case, turn the crankshaft 360° in the
direction of engine rotation again. No. 1
piston is now at top dead center on the
compression stroke.
3. Loosen the lock nut for the adjusting screw. With a
feeler gauge inserted between the rocker arm and
valve cap, adjust the valve clearance by turning
the adjusting screw.
4. Hold the adjusting screw and tighten the lock nut.
Figure 253 Cylinder head bolt tightening sequence
< Front of engine
NOTE
Make an adjustment to the valve clearance when the
engine is cold.
Tightening torque
9 ± 0.5 kgf
2
m
(65 ± 4 lbf
2
ft)
[88 ± 5 N
2
m]
Figure 254 Timing mark
TDC (top dead
center) mark for No.
1 and No. 4 pistons
Mark on timimg
gear case
IT (injection
timimg) mark
TDC mark for No. 2
and No. 3 pistons
Item Standard
Valve clearance (both
inlet and exhaust valves)
0.25 (0.0098)
Table 8 Valve clearance, unit mm (in.)
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