DISASSEMBLY OF BASIC ENGINE
5-2
1. Disassembling and inspecting cylinder head and valve mechanism
Disassembling and inspecting cylinder head and valve mechanism
Disassembling sequence
1 Rocker cover 5 Cylinder head 9 Retainer
2 Rocker shaft assembly 6 Cylinder head gasket 10 Valve
3 Push rod 7 Valve cap 11 Valve spring
4 Cylinder head bolt 8 Valve lock 12 Valve stem seal
6
10
5
4
3
7
8
9
12
11
1
2
Worn rocker shaft,
Clogged oil hole
Spring fatigue
Bottom face distortion
Valve guide wear, damage
Valve seat contact,
damage, wear
Dent, Wear
Stepped wear, Damage
End face wear, damage
Cracks, Damage, Coolant leakage,
Oil leakage, Scale formation,
Gasket, Carbon deposit
Damaged threads
Clogged oil hole
Wear
Spring fatigue,
damage
Wear,
Valve face contact
Bend
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