VALVE TRAIN - CAMSHAFT, TAPPETS & PUSH RODS
Install valve train components as follows:
If the camshaft bushings were removed install
new bushings using the Camshaft Bushing
Puller and Installer Tool. Be sure the oil holes in
the bushing (2, Fig. 16) line up with the oil holes
in the crankcase (1) as shown.
Figure 16. - Camshaft Bushing Installation
Crankcase Oil Hole
Bushing Oil Hole
To ease oil hole alignment, mark the back-up nut
(3, Fig. 16) in line with the bushing oil hole (2)
as shown when installing the bushings.
NOTE: The bushing and crankcase oil holes must
If it is necessary to replace the camshaft gear,
proceed as follows:
The drive gear on the camshaft must be
pressed off since it is a shrink fit.
Place the thrust plate on the keyway end of
the camshaft against the bearing journal.
Insert the Woodruff Key into the keyway.
Heat the camshaft gear to approximately
NOTE: Use thermomelt stick to determine
temperature. (See tool list for tool number).
Press the gear against the shoulder on the
shaft with the timing mark pointed outward
as shown in Fig. 17.
CAUTION: Use asbestos gloves when installing
Figure 17. - Installing Camshaft Drive Gear
Coat the cam lobes, bearings and journals with
clean engine oil and install the camshaft.
Install the camshaft so that the timing marks
stamped on each gear as shown in (1, Fig. 17)
are in line.
Alternately tighten the thrust plate cap screws to
27 Nm (20 Ibf-ft) torque.
Check the camshaft end play with a dial
0.13 mm (0.005 in.)
0.33 mm (0.013 in.)
specifications must be met.
Install crankcase front cover as described in
Lubricate the O.D. of the tappets with clean
engine oil and tappet faces with Moly Kote "G-n"
or Fel Pro C-670 paste. Then install tappets into
Install the cylinder head and adjust valve lash as
outlined in Section 3.
NOTE: It is recommended that the engine be run at
1000 RPM from three to five minutes after engine is
assembled. At 1000 RPM the tappets are under
lighter load, thus lubrication of tappets and tappet
bores is assured.
PRINTED IN UNITED STATES OF AMERICA