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CAMSHAFT
5-8
4. 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 arms “1”
• Valve clearance adjusting screws “2”
Damage/wear → Replace.
2. Check:
• Rocker arm shaft
Blue discoloration/excessive wear/pitting/
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.
5. Calculate:
• Rocker-arm-to-rocker-arm-shaft clear-
ance
TIP
Calculate the clearance by subtracting the
rocker arm shaft outside diameter from the
rocker arm inside diameter.
Rocker arm inside diameter
12.000–12.018 mm (0.4724–
0.4731 in)
Limit
12.036 mm (0.4739 in)
Rocker arm shaft outside diam-
eter
11.981–11.991 mm (0.4717–
0.4721 in)
Limit
11.950 mm (0.4705 in)