INTAKE AND EXHAUST VALVES REFACING - TM-9-2320-260-34-10271

TM 9-2320-260-34-1

3-77. INTAKE AND EXHAUST VALVES REFACING

THIS TASK, COVERS:

a. Valve Specifications

c. Cleaning After Refacing

b. Grinding or Refacing Valves

INITIAL SETUP

REFERENCES (TM)

APPLICABLE MODELS

All

TM 9-2320-260-34 P-1

TM 9-4910-484-10

TOOLS

EQUIPMENT CONDITION

General mechanic's tool kit

Intake and/or exhaust valve(s) removed

(Appendix B, Item 1)

Valve refacer (Appendix B, Item 41)

Outside micrometer (Appendix B, Item 8)

a. Valve Specifications

Inspect intake and exhaust valves (1). Refer to table 3-4, Valve Specifications, for limits. If rim thickness

is 0.0591 in. (1.501 mm) or greater, intake and/or exhaust valve(s) can be resurfaced.

Table 3-4. Valve Specifications.

WEAR LIMITS/TOLERANCES

POINT OF MEASUREMENT

ENGLISH

METRIC

11.40-11.46 mm

Stem

0.449-0.4510 in.

Seat angle

Intake

Exhaust

1.501 mm

0.0591 in.

Refacing depth

2.67 mm

Valve head thickness

0.105 in.