Repair. - TM-10-3930-673-340146

TM 10-3930-673-34

3-7. CYLINDER HEAD ASSEMBLY REPLACEMENT/REPAIR (CONT)

e. Repair.

(1)

Grind intake and exhaust valves (8

and 9).

(a)

Grind valves to proper face angle.

Valve Face Angle

Intake: 30

Exhaust: 45

TR00613

(b)

Measure valve rim thickness.

Limit

Minimum (A): 0.031 in.

(0.79 mm)

If rim thickness is less than

0.031 in. (0.79 mm)

after grinding, replace valve.

TR00614

(c)

Tag and mark valves again

respective to their location in

cylinder head.

TR00615

(2)

Machine valve guide bores.

If valve guide bores are scratched, scored,

burned, or worn, the guide bores must be

machined and service valve guides

installed.

(a)

To install service valve guides

3906206 (thin wall intake and

exhaust guides), machine cylinder

head parent metal valve guide bores

(B) to 0.4375 - 0.4385 in. dia (11.11 -

TR00616

11.14 mm).

3-44