Maintenance under severe operating conditions
The maintenance intervals shown on the preceding pages are for normal
operating conditions. If the vehicle is mainly operated under severe driving
conditions as shown below, more frequent maintenance must be performed on the
following items as shown in the table.
Severe driving conditions
...
Valve oil seal
VALVE OIL SEAL : Removal and Installation
REMOVAL
Remove camshafts.
Remove valve lifters.
Rotate crankshaft, and set piston with valve oil seal to be removed to
TDC. This will prevent the valve
from dropping into cylinder.
CAUTION:
When rotating crankshaft, be careful to avoid ...