Kohler Command CV730 - Manual (Page 198)

11.11
Section 11
Reassembly
11
Figure 11-36. Installing Valves with Valve Spring
Compressor.
Install Cylinder Heads
NOTE: Cylinder heads must be attached with the
original type of mounting hardware, using
either hex flange screws, or mounting studs
with nuts and washers. The heads are
machined differently for studs than for
screws, so the fastening method cannot be
altered unless the heads are being replaced.
Do not intermix the components.
1. Check to make sure there are no nicks or burrs on
the sealing surfaces of the cylinder head or the
crankcase.
Heads secured with hex flange screws:
2. Install a new cylinder head gasket (with printing
up).
NOTE: Match the numbers embossed on the
cylinder heads and crankcase. See Figure
11-32.
3. Install the cylinder head and start the four new
hex flange screws.
NOTE: When installing cylinder heads, new
screws should always be used.
Figure 11-37. Torquing Cylinder Head Fasteners.
4. Torque the hex flange screws in two stages; first
to 22.6 N·m (200 in. lb.), then finally to 41.8 N·m
(370 in. lb.), following the sequence in Figure
11-38.
Figure 11-38. Cylinder Head Fastener Torque
Sequence.
Heads secured with mounting studs, nuts, and
washers:
2. If all of the 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 the crankcase.
a. Thread and lock two of the mounting nuts
together on the smaller diameter threads.
#1 #2