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 8 Rocker shaft spring 15 Valve lock
2 Rocker shaft assembly (including 3 - 9) 9 Rocker shaft 16 Retainer
3 Grooved pin 10 Valve cap 17 Valve spring
4 Snap ring 11 Push rod 18 Valve stem seal
5 Exhaust rocker arm 12 Cylinder head bolt (main) 19 Intake valve
6 Rocker stay 13 Cylinder head bolt (sub) 20 Exhaust valve
7 Intake rocker arm 14 Cylinder head 21 Cylinder head gasket
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Damage to threaded portion
Clogged oil hole, wear
Clogged oil hole, wear
Wear and damage on both ends, bend
Replace: Stem seal
Local wear
Valve guide wear, damage
Replace: Cylinder gasket
Local wear, damage
and fatigue of stem face
Contact, damage and
wear of valve seat surface
Crack, damage, coolant leakage,
oil leakage, scale, gasket, carbon deposit
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Wear and damage
Damage to threaded portion
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