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Service Manual Mitsubishi SL-Series diesel engines
Version 08/2004
FUEL INJECTION TIMING
ENGLISH
MAINTENANCE
49.3 Adjustment
1. If the fuel injection timing is incorrect, change the
thickness of shims under the fuel injection pump.
An increase or decrease of the shims by 0.1 mm
(0.004 in.) will vary the timing by 1°.
2. Increase the thickness of the shims to retard the
timing or decrease it to advance the timing.
Four kinds of shims are available in thicknesses
0.2 mm (0.007 9 in.), 0.3 mm (0.011 8 in.), 0.4 mm
(0.015 7 in.) and 0.8 mm (0.031 5 in.). These
shims have no identification; measure the thick-
ness of each shim with a calipers before using it.
3. After the timing has been adjusted, make sure it is
correct.
4. Close the fuel filter valve and restore the delivery
valve and injection pipe to the original state.
Figure 262 Adjusting fuel injection timing
Figure 263 Adjusting fuel injection timing
Shims
TDC mark
Angle by which
fuel injection
timing is retarded
Increase
shim
thickness.
Angle by which
fuel injection
timing is
advanced
Advanced
Mark on
timing gear
case
Retarded
Decrease
shim
thickness.
Valve clearance (both
inlet and exhaust valves)
0.25 (0.0098)
CAUTION
Apply sealant to both faces of each shim to prevent
oil leaks.
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