Kohler Command CV17 Service Manual page 78

Reassembly
Install Cylinder Heads
Torque Sequence
1
NOTE: Cylinder heads must be attached with original
type of mounting hardware, using either screws,
or mounting studs with nuts and washers. Heads
are machined differently for studs than for
screws, so fastening method cannot be altered
unless heads are being replaced. Do not
intermix components.
NOTE: Match numbers embossed on cylinder heads
and crankcase.
NOTE: When installing cylinder heads, new screws
should always be used.
Heads Secured With Screws
1. Check to make sure there are no nicks or burrs on
sealing surfaces of cylinder head or crankcase.
2. Install a new cylinder head gasket (with printing up).
3. Install cylinder head and start four new hex fl ange
screws.
4. Torque screws in two increments; fi rst to 22.6 N·m
(200 in. lb.), then fi nally to 41.8 N·m (370 in. lb.),
following sequence shown.
Heads Secured With Mounting Studs, Nuts, and
Washers
1. Check to make sure there are no nicks or burrs on
sealing surfaces of cylinder head or crankcase.
2. If all 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 2 mounting nuts together on
smaller diameter threads.
b. Thread opposite end of stud, with preapplied
locking compound, into crankcase, until specifi ed
height from crankcase surface is achieved. When
threading in studs, use a steady tightening motion
without interruption until proper height is
78
4. Check that dowel pins are in place and install a new
5. Install cylinder head. Match numbers on cylinder
2
6. Lightly lubricate exposed (upper) threads of studs
Install Push Rods and Rocker Arms
NOTE: Push rods should always be installed in same
1. Note mark or tag identifying push rod as either
2. Apply grease to contact surfaces of rocker arms and
3. Torque screws to 11.3 N·m (100 in. lb.).
4. Use a spanner wrench or rocker arm lifting tool, to lift
5. Repeat above steps for remaining cylinder. Do not
6. Rotate crankshaft to check for free operation of
Check Assembly
Rotate crankshaft a minimum of two revolutions to check
longblock assembly and overall proper operation.
Install Spark Plugs
1. Check gap using wire feeler gauge. Adjust gap to
2. Install plug into cylinder head.
3. Torque plug to 27 N·m (20 ft. lb.).
Install Ignition Modules
1. Rotate fl ywheel to position magnet away from
2. On engines equipped with SMART-SPARK
KohlerEngines.com
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 68 mm (2 3/4 in.).
c. Remove nuts and repeat procedure as required.
cylinder head gasket (printing up).
heads and crankcase. Make sure head is fl at on
gasket and dowel pins.
with engine oil. Install a fl at washer and nut onto
each mounting stud. Torque hex nuts in two stages;
fi rst to 16.9 N·m (150 in. lb.), then fi nally to 33.9 N·m
(300 in. lb.), following sequence shown.
position as before disassembly.
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.
rocker arm pivots. Install rocker arms and rocker arm
pivots on one cylinder head, and start screws.
rocker arms and position push rods underneath.
interchange parts from cylinder heads.
valve train. Check clearance between valve spring
coils at full lift. Minimum allowable clearance is 0.25
mm (0.010 in.).
0.76 mm (0.030 in.).
ignition module bosses.
modules are installed similarly with tabs out.
On engines not equipped with SMART-SPARK
modules are installed with spark plug lead wire from
module always away from cylinder. On cylinder 1,
single kill tab should be towards you. On cylinder 2,
single kill tab should be away from you (in).
both
™,
™
24 690 07 Rev. B