Kohler Command Pro CV173 Service Manual page 54

Reassembly
Cylinder Head Assembly
Prior to assembly, lubricate all components with engine
oil, including tips of valve stems and valve guides.
Install Valve Train
D
A Intake Valve Seal
Valve Spring
C
Retainer
1. Install intake and exhaust valves into their respective
positions in cylinder head.
2. Install intake valve seal onto intake valve. Next, slide
valve springs onto both valves and lock them in
place with valve spring retainers.
Install Cylinder Head
Torque Sequence
3
1
NOTE: Do not reuse cylinder head screws or gasket.
Always replace with new screws or gasket.
1. Examine sealing surfaces of cylinder head and
crankcase for nicks or burrs. Ensure dowel pins are
in position in crankcase.
2. Using cylinder head dowels as a guide, install a new
head gasket.
3. Install cylinder head and fi nger tighten new screws.
4. Torque screws in two stages; fi rst to 13 N·m
(115 in. lb.), fi nally to 25.7 N·m (227 in. lb.), following
sequence shown.
54
A
B
C
B
C
B Spring
D Valve
2
4
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Install Push Rod Assembly
A
A CV173 Guide Plate
E
A
A Push Rod
C Rocker Arm Pivot
E Rocker Arm Stud
NOTE: Installation and seating of push rods into tappet
recesses during this sequence is critical. To aid
with proper installation of push rods and rocker
arms, and for adjusting valve lash, position
engine with cylinder head up. When properly
installed, push rods extend approximately 1 in.
(25.4 mm) above guide plate.
1. With tabs on guide plate facing down, install guide
plate and secure with rocker studs.
2. Torque rocker studs to 13.6 N·m (120 in. lb.).
3. Install push rods into intake and exhaust positions,
as previously marked.
4. Apply grease to contact surfaces of rocker arms and
pivots.
5. Install rocker arms onto rocker studs. Match rocker
arm dimples with round push rod ends.
6. Loosely install pivots and jam nuts onto rocker studs.
7. With rocker arms and push rods in their correct
position, inspect push rod to guide plate clearance.
Push rods need to be centered in guide plate
opening. If contact is present, readjust guide plate
starting in step 1.
B
CV200, CV224
B
Guide Plate
A
B
C
D
B
C
D
B Rocker Arm
D Jam Nut
14 690 12 Rev. --