40
2. Place the cover on the Surface Plate covered with
#400 grit wet-or-dry sandpaper. Using light pres-
sure, move the 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
assembly by continuing to move the cover in a fig-
ure 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 keepers.
Account for an upper spring retainer.
CC994
2. Remove the valve seal and the lower remaining
spring seat. Discard the valve seal.
CC134D
CC136D
NOTE: The valve seals must be replaced.
3. Remove the valve springs; then invert the cylinder
head and remove the valves.
Measuring Valve Stem Runout
1. Support each valve stem end with the V Blocks;
then check the valve stem runout using a dial indi-
cator.
ATV-1082
2. Maximum runout must not exceed specifications.
Measuring Valve Stem Outside
Diameter
1. Using a micrometer, measure the valve stem out-
side diameter.
2. Acceptable diameter range (intake valve) must be
within specifications.
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 cover.
CAUTION
Water or parts-cleaning solvent must be used in con-
junction with the wet-or-dry sandpaper or damage to
the sealing surface may result.