Kohler K91 Service Manual page 130

I N STALL VALVES
1 . Rotate the crankshaft u ntil piston is at top
dead center of compression stroke .
2 . I nstall the valves and measure the valve-to­
tappet clearance using a flat feeler gauge . Re­
fer to Figure 1 2-38 .
Figu re 1 2-38. Measuring Valve-To-Tappet
Clearance.
NOTE : Valve faces and seats must be lapped-in
before checking /adjusting valve clearance. Refer
to the " Inspection And Repair/Reconditioning " sec­
tion .
Valve-to-tappet clearance :
Model Intake Valve
Valve K9 1 . 005" / . 009 "
K 1 6 1 , K 1 8 1 . 006" / . 008"
K241 , K30 1 , . 008" / . 0 1 0 "
K32 1 , K34 1
3 . Adjust valve-to-tappet clearance , a s neces­
sary.
On Models K9 1 , K1 4 1 , K 1 6 1 , and K1 8 1 ;
If clearance is too smal l , grind end of valve
stems until correct clearance is obtained .
Make sure stems are ground perfectly flat and
smooth.
If clearance is too large , replace the valves
and recheck clearance .
NOTE : Large clearances can also be reduced by
grinding the valves and /or valve seats . Refer to
the " Inspection And Repair/Reconditioning " section
for valve specifications.
Fig u re Adjusting Valve-To-Tappet
1 2-39.
Clearance.
On Models K24 1 , K301 , K3 2 1 , and K34 1 , ad­
j ust valve-to-tappet clearance by turning the
adjusting screw on tappets . Refer to Figure
1 2-39 .
4 . On Models K9 1 , K1 6 1 and K1 8 1 , install the
valve springs (close coils to top) , intake valve
spring retainer, exhaust valve rotator or retain­
er, and valves . Refer to Figure 1 2-40 .
Exhaust
. 0 1 1 " / . 0 1 5 "
. 0 1 7 " / . 0 1 9 "
. 0 1 7 " / . 0 1 9 "
' ­
, ... ,-.-
1 2 . 1 3