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Chapter 7 ASSEMBLY OF BASIC ENGINE
5. Cylinder Head and Valve Mechanism - Assemble
5.1 Cylinder Head - Assemble
(1) Apply engine oil to the valve stem, and insert valve into
valve guide.
Note: The inlet valve and exhaust valve are different. Make
sure the correct mounting position.
(2) Install the stem seal to valve guide with guide and seal
installer.
Note: Place the valve in valve guide before installing the
stem seal. The valve stem seal is centered with valve
stem.
(3) Apply engine oil to the lip of stem seal.
Stem Seal - Install
Valve and Valve Spring - Install
(4) Install the valve spring and rotator to the valve guide,
and then install the valve cotter with valve spring
pusher.
Valve Cotter - Install
(5) Tap the top of valve stem lightly several times with a
soft-head hammer to slightly open the valve, and make
sure that the valve spring and valve cotters are properly
installed and seated firmly.
Valve - Install
(a) Be careful when inserting the valve through stem
seal, as the edge of stem can cause damage to
the stem seal lip.
(b) Do not apply oil or liquid sealant to the fitting faces
between stem seal and valve guide.
(c) Always replace the stem seal with a new one.Stem
seal can not be re-used.
30.3 ± 0.1 mm
[1.193 ± 0.04 in.]
Guide and seal installer
P/N:32591-10300
Valve guide
Cylinder head
Valve stem
Stem seal
Stem seal
Valve spring
Valve rotator
Valve cotter
Application of engine oil
Valve spring pusher
P/N:33591-04500
Valve stem head
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