Mitsubishi 4DQ5 Service Manual Page 48

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Page view 47
(d)
Tighten
camshaft thrust plate
to
crankcase by using
machining holes in camshaft gear.
(9) Install the idler gear
as
follows:
(a) Install idler gear by matching the timing mark
on each gear.
(b) Inspecting
valve
timing after installation
of
timing gears
Timing gear match marks meeting each other
1-Camshaft gear
2-Cran kshaft gear
3-ldler
gear
4-lnjection
pump
gear
It
is
not necessary to check the
valve
timing,
provided
that
all matching marks on the timing
gears are aligned. Check the timing for verification
as
follows:
Direction
of
rotation
Using a 3 mm (0.12 in.) thick smooth steel plate,
add 3 mm (0.12 in.) clearance to intake and
ex-
haust valves
of
No. 1 cylinder. Then, insert a 0.05
mm (0.0020 in.) thickness gauge into between the
top
of
valve cap and rocker, and slowly turn the
crankshaft, trying to find a position where the
thickness gauge
is
firmly gripped (the valve starts
opening) and a position where the gauge
is
just
ungripped (the
valve
starts closing). Check to
make sure.that these positions coincide with the
angular positions shown in the
valve
timing
dia-
gram with 3 mm (0.12 in.) clearance added to
the valves.
-44-
t
Exhaust
BDC
Valve timing diagram
TDC
Direction
of
rotation
Intake
.......
--~f---+t--
Exhaust
BDC
Valve timing diagram with 3 mm
(0.12
in.)
clearance added
to
valves
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