POWR
5-31
6D45F11
Power unit
Checking the cylinder head
1.
Eliminate carbon deposits from the com-
bustion chambers and check for deterio-
ration.
2.
Check the cylinder head warpage using a
straightedge
1
and thickness gauge
2
in five directions as shown. Replace if out
of specification
Checking the oil pump
1.
Removing the screws
1
and disassem-
ble the oil pump.
2.
Measure the oil pump rotor clearances as
shown. Replace if out of specification.
Installing the valves
1.
Install the new valve stem seal
1
to the
valve guide, and then apply engine oil to
the valve guide.
6D450810
c
a
b
6D450840
6D450840
a
b
c
1
2
6D450820
E
6D450850
1
1
6D450531
Cylinder head warpage limit:
0.10 mm (0.0039 in)
Clearance
a
:
0.100–0.150 mm (0.0039–0.0059 in)
Clearance
b
:
0.040–0.140 mm (0.0016–0.0055 in)
Clearance
c
:
0.030–0.090 mm (0.0012–0.0035 in)
6D45F11-05 03.10.9 20:44 Page 34
