Yamaha 5TE-F8197-10, LIT-11616-16-02 Check Rocker arms Rocker arm shafts Damage/wear → Replace

CAMSHAFT, ROCKER ARMS AND VALVES

ENG

2.Check:

●Rocker arms

●Rocker arm shafts Damage/wear → Replace.

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Checking steps:

●Check the two contact areas on the rocker arms for signs of abnormal wear.

1)Rocker arm shaft hole

2)Camshaft lobe contact surface Excessive wear → Replace.

●Check the surface of the rocker arm shafts. Blue discoloration/pitting/scratches →

Replace/check lubrication.

●Measure the inside diameter a of the rocker

arm holes.

Out of specification → Replace.

Rocker arm inside diameter: 12.000 ~ 12.018 mm (0.4724 ~ 0.4731 in)

●Measure the outside diameter b of the

rocker arm shafts.

Out of specification → Replace.

Rocker arm outside diameter: 11.981 ~ 11.991 mm (0.4717 ~ 0.4721 in)

●Calculate the clearance by subtracting the rocker arm shaft outside diameter from the rocker arm inside diameter.

Clearance greater than 0.08 mm (0.003 in) → Replace the defective part(s).

Rocker arm to shaft standard clearance:

0.009 ~ 0.037 mm

(0.0004 ~ 0.0015 in)

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