Kohler Command PRO CV26, Service Manual

Page: 119 / 132

Reassembly
119 24 690 02 Rev. H KohlerEngines.com
Install Cylinder Heads
Torque Sequence
#1 #2
NOTE: Cylinder heads must be attached with original
type of mounting hardware, using either screws,
or mounting studs with nuts and washers. Do
not intermix components.
NOTE: Match numbers embossed on cylinder heads
and crankcase.
1. Check to make sure there are no nicks or burrs on
sealing surfaces of cylinder head or crankcase.
Heads secured with mounting studs, nuts, and washers:
2. If all of studs were left intact, go to Step 6. If any
studs were disturbed or removed, install new studs
as described in Step 3. Do not use/reinstall any
loosened or removed studs.
3. Install new mounting stud(s) into crankcase.
a. Thread and lock mounting nuts together on
smaller diameter threads.
b. Thread opposite end of stud, with preapplied
locking compound, into crankcase, until speci fi ed
height from crankcase surface is achieved. When
threading in studs, use a steady tightening motion
without interruption until proper height is
obtained. Otherwise frictional heat from engaging
threads may cause locking compound to set up
prematurely.
Studs closest to lifters must have an exposed height of
75 mm (2 15/16 in.).
Studs furthest from lifters must have an exposed height
of 69 mm (2 3/4 in.).
c. Remove nuts and repeat procedure as required.
4. Check that dowel pins are in place and install a new
cylinder head gasket (part number facing up).
5. Install cylinder head. Match numbers on cylinder
heads and crankcase. Make sure head is fl at on
gasket and dowel pins.
6. Lightly lubricate exposed (upper) threads of studs
with engine oil. Install a fl at washer and nut onto
each of mounting studs. Torque nuts in 2 stages; fi rst
to 16.9 N·m (150 in. lb.), then fi nally to 33.9 N·m
(300 in. lb.), following sequence.
Heads secured with screws:
2. Install a new cylinder head gasket (part number
facing up).
3. Install cylinder head and start screws.
4. Torque screws in 2 stages;
fi rst to 22.6 N·m
(200 in. lb.), then fi nally to 41.8 N·m (370 in. lb.),
following sequence.
Install Push Rods and Rocker Arms
NOTE: Push rods should always be installed in same
position as before disassembly.
1. Note mark or tag identifying push rod as either
intake or exhaust and cylinder 1 or 2. Dip ends of
push rods in engine oil and install, making sure that
each push rod ball seats in its hydraulic lifter socket.
2. Apply grease to contact surfaces of rocker arms and
rocker arm pivots. Install rocker arms and rocker arm
pivots on one cylinder head, and start screws.
3. Torque screws to 11.9 N·m (105 in. lb.).
4. Use a spanner wrench or rocker arm lifting tool to lift
rocker arms and position push rods underneath.
5. Repeat above steps for remaining cylinder. Do not
interchange parts from cylinder heads.
6. Rotate crankshaft to check for free operation of
valve train. Check clearance between valve spring
coils at full lift. Minimum allowable clearance is
0.25 mm (0.010 in.).
Check Assembly
Important: Rotate crankshaft a minimum of 2 revolutions
to check longblock assembly and overall proper
operation.
Install Spark Plugs
1. Check gap using wire feeler gauge. Adjust gap to
0.76 mm (0.03 in.).
2. Install plug into cylinder head.
3. Torque plug to 27 N·m (20 ft. lb.).