ENG
INSPECTION AND REPAIR
5-21
INSPECTION AND REPAIR
CYLINDER HEAD
1. Eliminate:
•
Carbon deposits
(from combustion chamber)
Use a rounded scraper (1).
NOTE:
Do not use a pointed tool to avoid damaging or
scratching:
•
spark plug thread
•
valve seats
•
combustion chamber
2. Inspect:
•
Cylinder head
Scratches/Damage ➔ Replace.
3. Measure:
•
Deformation
Out of specification ➔ Rework the surface.
Cylinder head deformation:
Less than 0.03 mm
4. Surface:
•
Cylinder head
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Levelling:
Level the cylinder head with wet 400 ~ 600 emery
paper in a figure-8 direction.
NOTE:
To avoid removing too much material on one side
only, turn the cylinder head a number of times.
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