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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) Outer diameter of valve bridge guide
• If the measurement is less than the limit or if the parts are un-
evenly worn, 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.
• Us
ing , install the valve bridge guide until
it securely contacts
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: Mitsubishi 6M70 Intake and exhaust valve (1)
Valve stem outer diameter
• If the measurement is less than the limit or the valve is worn ex-
tremely unevenly, replace the valve.
• When the valve has been replaced with a new one, make sure to
lap the valve and valve seat.
(2) Valve seat angle
• If the measurement deviates from the standard value, rectify the
valve.
(3) Valve margin
• If the measurement is less than the limit, replace the valve.
Refacing valve
• Limit grinding to a necessary minimum.
• If the valve margin is below the limit after grinding, replace the
valve.
• After grinding, make sure to lap the valve and valve seat.
CYLINDER HEAD AND VALVE MECHANISM
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