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ENGINE 3-31
• Install the special tool 3 between the valve spring and cylin-
der head.
• Using the special tools, compress the valve spring and
remove the two cotter halves from the valve stem.
09916-14510: Valve lifter
09916-14530: Valve lifter attachment
09916-84511: Tweezers
09919-28610: Sleeve protector
• Remove the valve spring retainer 4 and valve spring 5.
• Pull out the valve 6 from the combustion chamber side.
• Remove the oil seal 7 and spring seat 8.
• Remove the other valves in the same manner as described
previously.
CYLINDER HEAD DISTORTION
• Decarbonize the combustion chambers.
• Check the gasketed surface of the cylinder head for distortion
with a straightedge and thickness gauge, taking a clearance
reading at several places indicated.
• If the largest reading at any position of the straightedge
exceeds the limit, replace the cylinder head.
Cylinder head distortion:
Service Limit: 0.20 mm
09900-20803: Thickness gauge
To prevent damage of the tappet sliding surface with
the special tool, use the protector.
Do not reuse the removed oil seal.