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Mitsubishi 4DQ5 Service Manual Page 51

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(15) Install the push rods and rocker shafts
as
follows:
(a) Insert the push rods
(1) into the tappets.
(b) Install rocker shaft assembly
as
follows:
(c) Insert
"0"
rings (3) into oil pipe (2) and
connect the oil pipe to the front and rear
rocker shafts. Then temporarily install each
bracket to the cylinder head.
(d) Temporarily tighten two or three threads on the
oil pipe union nut and connector.
(e)
Secure the preinstalled brackets by tightening
four bolts at the front and rear sides uniformly
to a torque
of
1.5
kg-m
(10.85 lb-ft). Tighten
the long bolts (4) first.
(f) Connect oil pipe to connector securely. Then
adjust the
valve
clearance
to
0.25 mm (0.01 in.)
for both intake and exhaust
valves
in cold setting.
(16) Adjust valve clearance
as
follows:
The valve clearance specification for this engine
is
0.25
mm (0.0098 in.) for
both
intake and exhaust valves.
This value assumes that the engine
is
at normal tempera-
ture, there being no temperature difference throughout
the body
of
the engine. The checking and adjusting
procedure
is
as
follows:
(a) Rotate the crankshaft slowly
to
bring the piston in
No. 1 cylinder
to
Top Dead Center (TOC). This
can be accomplished by observing rocker arms
of
No.4
cylinder.
As
you turn the crankshaft,
exhaust-valve rocker arm
of
this cylinder rises: stop
turning the crankshaft just when intake-valve rocker
arm begins to
go
down after exhaust valve rocker
arm has come up all the way.
Under this condi-
tion, adjust valve clearance in the usual manner on
intake and exhaust valves
of
No.1
cylinder, intake
valve
of
No. 2 cylinder, and exhaust valve
of
No.3
cylinder.
(b) Turn the
cnnkshaft
one complete rotation (360°),
and hold it there. Adjust the clearance
on
intake
and exhaust valves
of
No.4
cylinder, exhaust valve
of
No.2
cylinder, and intake
valve
of
No.3
cylin-
der.
-47
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