Mitsubishi S12A2 User Manual

7-34
Chapter 7 ASSEMBLY OF BASIC ENGINE
5.14.2 Fuel Injection Timing - Check
(1) Turn the crankshaft in normal direction, and stop the
turning when the No. 1 cylinder is positioned at approx
10° before the specified fuel injection timing.
Also, make sure that the line stamped on the fuel injec-
tion pump coupling is positioned before and close to the
pointer.
Note: In this condition, the clearances of inlet and exhaust
valves are as specified, and valves are not pushed
down.
In case of the exhaust stroke top dead center, valves are
pushed down.
(2) Turn the crankshaft to the normal direction progres-
sively, align the fuel injection timing mark on damper
with engine pointer.
If the fuel injection timing is adjusted to the specified
timing, the line stamped on the fuel injection pump
coupling (or timer) will align with the pointer.
If the line does not align with the pointer, adjust the fuel
injection timing.
Note: For the left fuel injection pump, rotate the crankshaft
in No.7 cylinder to before compression top dead cen-
ter, and then follow a procedure described above.
No. 1 Cylinder Compression Top Dead Center - Check
Fuel Injection Timing - Check
5.14.3 Fuel Injection Timing - Adjust
(1) Turn the crankshaft to the normal direction progres-
sively, align the fuel injection timing mark on damper
with engine pointer.
(2) Loosen the bolts of the driving coupling, and align the
line with the pointer by rotating the fuel injection pump
only. Then tighten the bolts.
(3) From the specified fuel injection timing, turn the crank-
shaft in the reverse direction by approx 10°.
(4) Turning the crankshaft to the normal direction progres-
sively again, align the line mark of fuel injection timing
with the pointer.
Then, make sure that the line on the fuel injection pump
coupling (or timer) aligns with the pointer.
Repeat the step (2) until the proper alignment is made.
Fuel Injection Timing - Adjust
1
・
・6
Pointer
Cylinder firing order:
1-12-5-8-3-10-6-7-2-11-4-9
Fuel injection pump
coupling punch mark
Pointer
88 ± 5 N·m
88 ± 5 N·m
{9 ± 0.5 kgf·m}
{9 ± 0.5 kgf·m}
[65 ± 3.7 lbf·ft]
[65 ± 3.7 lbf·ft]
Fuel injection pump
coupling (punch) mark
Pointer
88 ± 5 N·m
{9 ± 0.5 kgf·m}
[65 ± 3.7 lbf·ft]

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English