Valve Stem Seals; Assemble Cylinder Heads; Install Cylinder Heads; Valve Components - Kohler CH18-745 Service Manual

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
Figure 11-36. Match Numbers on Cylinder Barrel and
Head.
Figure 11-37. Intake Valve Seal Location.

Valve Stem Seals

These engines use valve stem seals on the intake
valves and occasionally on the exhaust valves. Always
use a new seal whenever the valve is removed or if the
seal is deteriorated or damaged in any way. Never
reuse an old seal. Figure 11-37.

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 11-38 and
11-39.
• Intake and exhaust valves
• Valve spring caps
• Valve springs
• Valve spring retainers
• Valve spring keepers
Retainer
Figure 11-38. Valve Components.
Intake
Valve
Seal
Figure 11-39. Installing Valves with Valve Spring
Compressor.

Install Cylinder Heads

NOTE: Cylinder heads must be attached with the
1. Check to make sure there are no nicks or burrs
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Valve
Spring
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.
on the sealing surfaces of the cylinder head or the
crankcase.
Section 11
Reassembly
Keepers
Cap
11
11.11