Fuel Injection Timing - Mitsubishi S6S Service Manual

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.1 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.1 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.1
plunger of the injection pump. Remove delivery
valve and spring from the holder. Restore the holder
to the pump.
(b) Connect 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.
ADJUSTMENTS, BENCH TEST, PERFORMANCE TESTS
Finding top dead center on compression stroke
Delivery valve holder
Spring
Delivery valve
Checking injection timing
(Removing delivery valve)
Checking injection timing
5-3
Crankshaft pulley