Cylinder Head Valves-continued

TM 9-2320-312-24-2

Specifications Section

Exhaust valve ....................... 45 0.25 degrees

Minimum operating length ................... 46.4 mm

(1.83 inch)

Load at minimum operating length .. 899 36 N

(202 8 lb)

(5) Height to the top of the valve guides

Inlet valves ............................. 23.00 0.50 mm

(0.906 0.020 inch)

Exhaust valves ....................... 17.80 0.50 mm

(0.701 0.020 inch)

Diameter of valve guide ................... 12.065 mm

(0.4750 inch)

Note: Install the valve guide from the spring side of

the cylinder head.

g00291916

Illustration 11

Note: Assemble the valve guide. Seat the seal

against the top of the valve guide.

(9) Diameter of the valve seat inserts

Inlet valve ........................... 42.000 0.013 mm

(6) Valve stem diameter (new)

(1.6535 0.0005 inch)

Inlet valves ........................... 8.000 0.008 mm

Exhaust valve ..................... 46.000 0.013 mm

(0.3150 0.0003 inch)

(1.8110 0.0005 inch)

Exhaust valve ....................... 9.441 0.010 mm

(0.3717 0.0004 inch)

Diameter of the bore in cylinder head for the valve

seat insert

The cylinder head valves can be reused if the

minimum dimensions for the valve stems are met.

Bore diameter

Inlet valve ........................... 41.931 0.013 mm

Minimum diameter of a valve stem (worn)

(1.6508 0.0005 inch)

Inlet valve .................... 7.965 mm (0.3136 inch)

Exhaust valve ..................... 45.931 0.013 mm

Exhaust valve .............. 9.408 mm (0.3704 inch)

(1.8083 0.0005 inch)

After installation into the cylinder head, the valve

Note: The valve seat insert must be shrunk by

guide bore is the following value.

reduced temperature before the valve seat insert

is installed in the head.

Diameter of the valve guide bore (new)

(10) Angle of the valve seat inserts

Inlet valve ............................. 8.072 0.013 mm

(0.3178 0.0005 inch)

Inlet valve ........................ 30.25 0.25 degrees

Exhaust valve ....................... 9.515 0.013 mm

Exhaust valve .................... 44.5 0.25 degrees

(0.3746 0.0005 inch)

(11) Depth of the bore in the head for the valve seat

The valve guide can be reused. The valve guide

insert ..... 10.00 0.05 mm (0.394 0.002 inch)

bore must not be larger than the following value.

(12) Outside diameter of the seating face of the

Maximum diameter of a valve guide bore (worn)

valve seat insert

Inlet valve .................... 8.080 mm (0.3181 inch)

Inlet valve .................. 37.351 mm (1.4705 inch)

Exhaust valve .............. 9.538 mm (0.3755 inch)

Exhaust valve ............ 40.800 mm (1.6063 inch)

(7) Diameter of the valve head

Note: Do not reuse the valve seat inserts if the

outside diameter of the valve seat insert is larger

Inlet valve ............................... 40.00 0.13 mm

than the specified value.

(1.575 0.005 inch)

Exhaust valve ......................... 43.00 0.13 mm

(13) The valve lips can be reused if the minimum

(1.693 0.005 inch)

dimensions for the valve lips are met.

(8) Angle of the valve faces

Inlet valve ........................ 2.04 mm (0.080 inch)

Exhaust valve .................. 1.63 mm (0.064 inch)

Inlet valve ........................ 29.75 0.25 degrees