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CYLINDER HEAD

VALVE INSERTS

Check valve inserts for any evidence of pitting at

valve contact surface, and reseat or replace if exces-

sive!y worn out.

•    When repairing valve inserts, check valve and valve guide for wear beforehand. If worn, replace them. Then correct valve seat.

•    Cut or grind valve inserts uniformly with both hands.

If necessary, replace valve inserts as follows:

1.    After removing valve insert, ream the cylinder head recess.

2.    Heat cylinder head to a temperaturę of 150 to 160°C (302 to 320° F).

3.    Press fit insert until it seats on the bottom, and caulk morę than 4 points.

4.    Cut or grind valve inserts using suitable tool to the specified dimensions as shown in S.D.S.

Inspection (Cont'd)_

CAMSHAFT JOURNAL CLEARANCE

Wear limit:

0.15 mm (0.0059 in)

5.    After cutting, lap valve inserts with a lapping compound.

6.    Check contact condition of valve inserts.

CAMSHAFT RUNOUT

*: Total indicator reading

EM302