Kohler Aegis TP-2509 - Manual (Page 112)

11.8
Section 11
Reassembly
Assemble Cylinder Heads
Prior to installation, lubricate all components with
engine oil, paying particular attention 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 11-21, 11-22,
and 11-23.
• Valve stem seals (intake valve only)
• Intake and exhaust valves
• Valve spring caps
• Valve springs
• Valve spring retainers
• Valve spring keepers
NOTE: These engines use valve stem seals on the
intake valves. Always use a new seal when
valves are installed in the cylinder head. Also,
replace the seals if they are deteriorated or
damaged in any way. Never reuse an old
seal.
Figure 11-23. Installing Valve with Spring
Compressor.
Install Cylinder Heads
1. Check to make sure there are no nicks or burrs
on the sealing surfaces of the cylinder heads or
crankcase.
2. Install a new cylinder head gasket.
NOTE: Match numbers embossed on cylinder
heads and crankcase.
3. Install the #1 cylinder head onto the #1 side
mounting studs. Do the same for the #2 head.
4. Install a plain washer onto each stud and secure
with a hex. flange nut.
5. Initially torque the four hex. flange nuts in the
proper sequence to 16.9 N·m (150 in. lb.). See
Figure 11-24 for the correct torque sequence.
Repeat the procedure, and torque the flange nuts
to a final value of 33.9 N·m (300 in. lb.). See
Figure 11-25.
Figure 11-21. Intake Seal.
Figure 11-22. Valve Components.