CAMSHAFT
EAS23840
CHECKING THE CAMSHAFT
1. Check:
• Camshaft lobes
Blue discoloration/pitting/scratches
→
Re-
place the camshaft.
2. Measure:
• Camshaft lobe dimensions “a” and “b”
Out of specification
→
Replace the camshaft.
3. Check:
• Camshaft oil passage
Obstruction
→
Blow out with compressed air.
EAS23880
CHECKING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
The following procedure applies to all of the
rocker arms and rocker arm shafts.
1. Check:
• Rocker arm
Damage/wear
→
Replace.
2. Check:
• Rocker arm shaft
Blue discoloration/excessive wear/pit-
ting/scratches
→
Replace or check the lubri-
cation system.
3. Measure:
• Rocker arm inside diameter “a”
Out of specification
→
Replace.
4. Measure:
• Rocker arm shaft outside diameter “a”
Out of specification
→
Replace.
Camshaft lobe dimensions
Intake A
30.225
–
30.325 mm (1.1900
–
1.1939 in)
Limit
30.125 mm (1.1860 in)
Intake B
25.127
–
25.227 mm (0.9893
–
0.9932 in)
Limit
25.027 mm (0.9853 in)
Exhaust A
30.232
–
30.332 mm (1.1902
–
1.1942 in)
Limit
30.132 mm (1.1863 in)
Exhaust B
25.065
–
25.165 mm (0.9868
–
0.9907 in)
Limit
24.965 mm (0.9829 in)
Rocker arm inside diameter
9.985
–
10.000 mm (0.3931
–
0.3937 in)
Limit
10.015 mm (0.3943 in)
Rocker arm shaft outside diame-
ter
9.966
–
9.976 mm (0.3924
–
0.3928
in)
Limit
9.941 mm (0.3914 in)