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Removal procedure
Removal: Valve cotters
• Using , and , remove the valve cotter while com-
pressing the valve spring(s) evenly.
Inspection procedure
Inspection: Valve bridge and valve bridge guide
(1) Valve bridge-to-guide clearance
• If the measurement exceeds the limit, replace the defective
part(s).
(2) Outside diameter of valve bridge guide
• If the measurement is less than the limit or the valve bridge
guide is worn extremely unevenly, replace the valve bridge
guide.
Replacement of valve bridge guide
[Installation]
• Before installation, ensure that no water, oil or other foreign mat-
ter is in the installation hole.
• Using , install the valve bridge guide until comes into
positive contact with the cylinder head.
CAUTION
• The valve bridge guide must be installed to the specified
depth of the cylinder head. Correct installation can only be
possible by using .
Inspection: Intake and exhaust valve
(1) Valve stem outside diameter
• Replace the valve if the stem’s outside diameter is below the lim-
it or is severely worn.
• When the valve has been replaced with a new one, make sure to
lap the valve and valve seat.
(2) Valve seat angle and valve margin
• Reface or replace the valve if the valve seat angle or valve mar-
gin exceeds the specified limits.
• After refacing or replacing the valve seat, make sure to lap the
valve and valve seat.
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