(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 "O" 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 (TDC). 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.
