CYLINDER HEAD |
1.Check the cylinder head
for water leakage, gas leakage, damage or cracks before
cleaning. |
2.Completely remove oil,
scale, sealant, carbon, etc. After cleaning oil passages,
blow
air to make sure that they are not clogged. |
VALVE |
1.Repair the valve seat if
contact with the valve seat is poor, uneven or
broken. 2.Measure the margin. If the limit is exceeded, replace the valve. Standard value:
Exhaust 1.094 mm
Exhaust 0.594 mm |
3.Measure overall length of
the valve. If the limit is exceeded, replace the valve. Standard value:
Exhaust 105.89 mm
Exhaust 105.39 mm |
VALVE SPRING |
1.Measure free height of the
spring. If the limit is exceeded, replace the spring. Standard value: 49.4 mm Limit: 48.4 mm 2.Measure squareness of the spring. If the inclination exceeds the limit, replace the spring. Standard value: 2° or less Limit: 4° |
VALVE GUIDE |
Measure clearance between the valve
guide and valve stem. If the clearance exceeds the
limit, replace the valve guide or valve, or
both. Standard value:
Exhaust 0.030 - 0.057 mm
Exhaust 0.15 mm |
VALVE SEAT |
Assemble the valve, then measure
the contact width. If the measurement exceeds the specified
limit, replace the valve seat. Standard value
Exhaust: 1.35 - 1.65 mm
|
REPAIR PROCEDURE OF VALVE SEAT |
1.Check clearance between
valve guide and valve and replace the valve guide if
necessary
before repairing the valve seat. |
2.Repair the valve seat so
that seat width and seat angle are to the specified
shape. 3.Lap valve and valve seat with lapping compound after repairing valve seat. |
REPLACEMENT PROCEDURE OF VALVE SEAT |
1.Scrape the valve seat to
be replaced from inside to make its wall thickness thin
before
pulling out. |
2.Repair the valve seat hole
of the cylinder head to match it with the diameter of the
oversize
valve seat to be press fitted. Inlet valve seat bore diameter:
4.Ream the valve seat. Refer to "Repair procedure of valve seat." |
REPLACEMENT PROCEDURE OF VALVE GUIDE |
1.Pull out the valve guide
with a press toward the cylinder block side. |
2.Ream the valve guide hole
of the cylinder head to match it with the diameter of the
oversize valve guide to be press fitted.
|
3.Press fit the valve guide
to the illustrated dimension. Standard value: 14.6 - 15.2 mm
|