Kohler Command PRO CS Service Manual page 145

NOTE: The engine utilizes a valve stem seal on the
intake valve. Always use a new seal when
valves are installed in the cylinder head.
Replace the seal if it is deteriorated or
damaged in any way. Never reuse an old seal.
2. Install the valves, valve springs, and retainers into
their respective locations in the cylinder head.
3. Compress each valve spring/retainer assembly
with a valve spring compressor and lock in place
with lock clip. Install the lock clip with its
rounded edges down.
Figure 11-64. Installing Valves Using Valve Spring
Compressor.
4. If intake or exhaust port studs were removed
previously reinstall them at this time. Torque the
studs to:
CS4, CS6, CS8.5 (spec. 95xxxx):
4-5 N·m (35-44 in. lb.)
CS8.5 (spec. 92xxxx), CS10, CS12:
12-19 N·m (106-168 in. lb.)
Install Cylinder Head
1. Check to make sure there are no nicks or burrs on
the sealing surfaces of the cylinder head or
crankcase.
2. Rotate the crankshaft to position the piston at
TDC on compression stroke.
3. Install the dowel pins into the recesses around
the lower cylinder head bolt holes.
4. Install a new cylinder head gasket.
Figure 11-65. Installing Dowel Pins and New Head
Gasket.
5. Install the cylinder head and start the four hex
flange screws. Torque the screws in several
increments, using the sequence shown (See
Figures 11-66 and 11-67) to:
CS4, CS6: 20 N·m (177 in. lb.)
CS8.5-12: 50 N·m (36 ft. lb.)
Figure 11-66. Tightening Cylinder Head Screws.
4
1
Figure 11-67. Cylinder Head Screws Torquing
Sequence.
Section 11
Reassembly
11
2
3
11.17