Service Manual

5-10 ENGINE TOP END
Cylinder Head
Push Rod Installation
•
Set each piston at the T.D.C of the compression stroke.
•
Apply engine oil to the both ends and shaft of the push
rod.
•
Install the push rods in their original positions of the tappet
hollow [A].
•
Check that both inlet and exhaust push rods on each
cylinder are at lowest position on the cam lobes. If the
piston is not at the T.D.C of the compression stroke, turn
the flywheel clockwise one turn (360°) and reset each pis-
ton at the T.D.C of the compression stroke.
•
Be sure the end of the push rods are correctly seated on
the tappets.
•
Install the rocker arm (see Valve Mechanism Removal/In-
stallation).
•
Check and adjust the valve clearance (see Valve Clear-
ance Inspection in the Periodic Maintenance chapter).
Push Rod Inspection
•
Place the push rod on V blocks as far apart as possible,
and set a dial gauge [A] on the rod at a halfway point
between the blocks. Turn the rod to measure the runout.
The difference between the highest and the lowest dial
readings is the amount of runout.
If the runout exceeds the service limit, replace the rod with
a new one.
Rocker Arm Push Rod Runout
Service Limit: TIR 0.5 mm (0.02 in.)
Valve Mechanism Removal/Installation
NOTE
○
When removing the valve mechanism parts, note their
position so that t
hey may be reinstalled in their original
position during assembly.
•
Remove:
Valve Clearance Adjusting Locknuts [A]
Valve Clearance Adjusting Bolts [B] and Washer
Collar
Rocker Arm [C]