3-13
3
NOTE: Support the connecting rod with rubber
bands to avoid damaging the rod or install a suit-
able connecting rod holder.
Servicing Top-Side
Components
NOTE: Whenever a part is worn excessively, cracked,
or damaged in any way, replacement is necessary.
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for pits,
burn marks, or other signs of abnormal wear.
NOTE: Whenever a valve is out of tolerance, it
must be replaced.
Cleaning/Inspecting Valve Cover
NOTE: If the valve cover cannot be trued, the cyl-
inder head assembly must be replaced.
1. Wash the valve cover in parts-cleaning solvent.
2. Place the valve cover on the Surface Plate covered
with #400 grit wet-or-dry sandpaper. Using light
pressure, move the valve cover in a figure eight
motion. Inspect the sealing surface for any indication
of high spots. A high spot can be noted by a bright
metallic finish. Correct any high spots before assem-
bly by continuing to move the valve cover in a figure
eight motion until a uniform bright metallic finish is
attained.
CC130D
Removing Valves
NOTE: Keep all valves and valve components as
a set. Note the original location of each valve set
for use during installation. Return each valve set to
its original location during installation.
1. Using a valve spring compressor, compress the valve
springs and remove the valve cotters. Account for an
upper spring retainer.
CC132D
2. Remove the valve seal and the lower remaining
spring seat. Discard the valve seal.
CC136D
NOTE: The valve seals must be replaced.
CAUTION
Do not allow the connecting rod to go down inside
the crankcase. If the rod is down inside the crank-
case and the crankshaft is rotated, severe damage
will result.
AT THIS POINT
To service piston, see Servicing Top-Side Compo-
nents sub-section.
AT THIS POINT
To service center crankcase components only, pro-
ceed to Removing Left-Side Components.
CAUTION
Do not remove an excessive amount of the sealing
surface or damage to the camshaft will result.
Always check camshaft clearance when resurfacing
the valve cover.
CAUTION
Water or parts-cleaning solvent must be used in
conjunction with the wet-or-dry sandpaper or dam-
age to the sealing surface may result.
Manual
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