Mitsubishi S4S Service Manual page 44

ADJUSTMENTS, BENCH TEST, PERFORMANCE TESTS
1.3 Fuel Injection Timing
The injection timing varies according to the output,
speed and specifications of the engine. Be sure to
verify the timing by referring to the specifications.
(1) Bringing the No.l cylinder piston to the top dead
center on compression stroke
(a) Put socket (58309-73100) on the crankshaft
pulley nut and turn the crankshaft in the
normal direction (clockwise as seen from the
front end).
(b) Stop turning the crankshaft when the timing
the mark "0" on the crankshaft pulley is
aligned with the pointer.
(c) Push down on the inlet and exhaust valve
rocker arms for the No.l cylinder to make sure
they are not being pushed up by the pushrods
(the inlet and exhaust valves have some
clearance).
(2) Checking injection timing
(a) Remove delivery valve holder from the No.l
plunger of the injection pump. Remove
delivery valve and spring from the holder.
Restore the holder to the pump.
(b) Conneet a spare injection pipe to the No.1
plunger, with its free end held downward so
that you can observe the fuel flow from that
end.
(c) Turn the crankshaft to bring the No.1 piston
to 60° position before top dead center on
compression stroke.
(d) While operating the priming pump to allow
the fuel to flow from the injection pipe, slowly
turn the crankshaft in the normal direction.
Stop turning the crankshaft when the fuel flow
stops.
(e) Make sure the timing mark on the crankshaft
pulley is aligned with the pointer.
5-4
Ol I I I I I 14Ql
Finding top dead center on compression stroke
Delivery valve hOlde'--t """'
Spring
Delivery valve _.= ,,,-,
Checking injection timing - I
(Removing delivery valve)
Checking injection timing - 2