3-26 ENGINE
CYLINDER HEAD AND VALVE
VALVE AND VALVE SPRING DISASSEMBLY
• Remove the tappets and shims by fingers or magnetic hand.
Identify the position of each removed part.
• Using special tools, compress the valve springs and remove
the two cotter halves 1 from valve stem.
\ 09916-14510: Valve lifter
09916-14521: Valve lifter attachment (24 mm)
09916-84511: Tweezers
Be careful not to damage the tappet sliding surface with
the special tool.
• Remove the valve spring retainer 2 and valve springs 3.
• Pull out the valve 4 from the other side.
• Remove the spring seat 5.
• Remove the oil seal 6.
Do not reuse the removed oil seal.
CYLINDER HEAD DISTORTION
• Decarbonize the combustion chambers.
• Check the gasket 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 ex-
ceeds the limit, replace the cylinder head.
\ 09900-20803: Thickness gauge
Cylinder head distortion:
Service Limit: 0.20 mm (0.008 in)
EX.IN.
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