ENGINE 3-25
CYLINDER HEAD
DISASSEMBLY
Remove the intake pipe
1.
Remove the cam chain tensioner
2.
Cam chain tentioner inspection (!3-34)
Compress the valve spring and remove the valve cotters from
the valve stem with the special tools.
& 09916-14510: Valve spring compressor
09916-14910: Attachment
09916-84511: Tweezers
Remove the valve spring retainer and valve spring.
Remove the valve from the other side.
Remove the valve stem seal with long-nose pliers.
Remove the valve spring seat.
NOTE:
Removal of valves completes ordinary disassembling work. If
valve guides have to be removed for replacement after inspect-
ing the related parts, carry out the steps shown in the valve
guide servicing.
CYLINDER HEAD DISTORTION
Decarbonize the combustion chamber.
Check the gasket surface of the cylinder head for distortion
using a straightedge and thickness gauge. Take clearance
readings at several places. If any clearance reading exceeds
the service limit, replace the cylinder head with a new one.
% Cylinder head distortion
Service Limit: 0.05 mm (0.002 in)
& 09900-20803: Thickness gauge
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