SERVICE MANUAL
CYLINDER HEAD & VALVES
Section 3
Figure 36. - Valve Lever and Shaft Assembly
1.
Rocker arm
2.
Support bracket
3.
Spring
4.
Shaft
5.
Snap ring
Valve Lash Adjustment
NOTE: DO NOT adjust valves with the engine
running. Severe damage can result from inserting
feeler gauge between valve and valve lever due to
close clearance of valve to piston.
NOTE: Valve lash may be adjusted as a separate
operation without cylinder head and valve lever
removal, disassembly, cleaning, inspection or repair
as previously described.
All valves are adjusted by cranking the engine only
twice.
Perform valve lash adjustment with the engine
"warm"
which
means
any
temperature
above
freezing.
-IMPORTANT-
The Valve Lash Adjustment Chart reflects specification
changes which result from the revised intake ramp
height of the 400 Series Camshaft. The intake valve
lash specification has been increased from .51 mm
(0.020 in.) to .64 mm (0.025 in.). A common valve lash
setting of 0.025 in. now exists for both intake and
exhaust valves on 400 Series Engines (see Valve Lash
Adjustment Chart).
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
Page 27
