Table of Contents
Advertisement
EM–42
(4) Calculation of oil clearance
Calculate the oil clearance of each valve according to
the following formula.
Oil clearance =
Specified Oil Clearance
Intake Valve Side:
Exhaust Valve Side:
Allowable Limit
Intake Valve Side:
Exhaust Valve Side:
If the calculated oil clearance exceeds the allowable
limit, replace the valve guide bush and valve as a set.
16. Replacement of valve guide bush
CAUTION:
•
Removal and installation of the valve guide bush
should be carried out while the cylinder head tempera-
ture is 80°C - 100°C after heating it gradually.
(1) Intake valve guide bush
NOTE:
•
If the intake valve guide bush has been already in-
stalled with a locating ring, replace the cylinder head.
q Drive out the valve guide bush from the combus-
tion chamber side, using the following SST.
SST:
09201-87705-000
NOTE:
•
Be very careful not to tap the cylinder head.
w Drive a new valve guide bush into position, until
the snap ring contacts the cylinder head, using the
following SST.
SST:
09201-87705-000
CAUTION:
•
Be very careful not to give an excessive impact during
the installation. Failure to observe this caution will re-
sult in valve guide bush cracks.
•
Care should be exercised not to detach the snap ring
due to driving the valve guide bush excessively.
Inner diameter of valve stem guide –
Outer diameter of valve stem
0.030 - 0.055 mm
0.035 - 0.060 mm
0.080 mm
0.090 mm
JEM00164-00000
Locating ring
JEM00165-00150
JEM00166-00151
JEM00167-00152
Advertisement
Table of Contents
