SERVICE MANUAL
CYLINDER HEAD & VALVES
Section 3
Adjust Valve Lash as Follows:
1.
Remove the valve cover. Turn the crankshaft
until
the
number
one
piston
is
on
the
compression stroke and the timing pointer on the
front cover is in line with the TDC mark (pin) on
vibration damper or flywheel (as shown in Fig.
37).
Figure 37. - Timing Marks on Flywheel
NOTE: Be sure that the number one piston is on the
compression stroke by turning both push rods by
hand to determine that both valves are closed.
Valves are closed when push rods are loose and can
be turned easily.
2.
Six valves are adjusted when the No. 1 piston is
at TDC (compression) and the remaining six are
adjusted when the No. 6 piston is at TDC
(compression). As depicted in Fig. 38 odd
numbered valves are intake valves; and even
numbered valves are exhaust valves.
3.
Valve tappet clearance (lash) is specified in
Valve Lash Adjustment Chart (located in this
section).
NOTE: When tightening head bolts, place a .005"
feeler gauge between the outside brackets and the
rocker levers to prevent binding.
4.
Replace the valve cover (see INSTALLATION in
this Section).
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
Page 28
