Kohler Command PRO ECH630 Service Manual page 135

Figure 10-29. Valve Seal Location.
Assemble Cylinder Heads
Prior to installation, lubricate all components with
engine oil, paying particular att ention to the lip of the
valve stem seal, valve stems, and valve guides. Install
the following items in the order listed below using a
valve spring compressor. See Figures 10-30 and 10-31.
• Intake and exhaust valves
• Valve spring retainers
• Valve springs
• Valve spring caps
• Valve spring keepers
Valve
Retainer Spring
Figure 10-30. Valve Components.
Valve
Seals
Figure 10-31. Installing Valves with Valve Spring
Compressor.
Install Cylinder Heads
NOTE: Cylinder heads must be att ached with the
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 mounting studs, nuts, and
washers:
2. If all of the studs were left intact, go to Step 6. If
Keepers
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
b. Thread the opposite end of the stud with
Cap
The studs closest to the lift ers must have an exposed
height of 75 mm (2 15/16 in.).
The studs furthest from the lift ers must have an
exposed height of 69 mm (2 3/4 in.).
original type of mounting hardware, using
either hex fl ange screws, or mounting studs
with nuts and washers. Do not intermix the
components.
together on the smaller diameter threads.
the preapplied locking compound into the
crankcase until the specifi ed height from the
crankcase surface is achieved. See Figure
10-32. When threading in the studs, use a
steady tightening motion without interruption
until the proper height is obtained. Otherwise,
the frictional heat from the engaging threads
may cause the locking compound to set up
prematurely.
Section 10
Reassembly
10
10.9