Toyota Tundra. Manual — part 1872

Fig. 182: Checking Combustion Chamber
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3

INSPECT INTAKE VALVE

a

Clean the valves

1

Using a gasket scraper, chip off any carbon from the valve head

2

Using a wire brush, thoroughly clean the valve

Fig. 183: Cleaning Valves Using Gasket Scraper & Wire Brush
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Using a micrometer, measure the diameter of the valve stem

Standard valve stem diameter: 5.470 to 5.485 mm (0.215 to 0.216 in.)

Fig. 184: Measuring Diameter Of Valve Stem Using Micrometer
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra

c

Check the valve face angle

1

Grind the valve sufficiently to remove pits and carbon

2

Check that the valve is ground to the correct valve face angle

Standard valve face angle: 44.5°

If the valve face is worn, replace the valve

Fig. 185: Checking Valve Face Angle
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d

Check the valve head margin thickness

Standard margin thickness: 1.0 mm (0.0394 in.)

Minimum margin thickness: 0.5 mm (0.0197 in.)

If the margin thickness is less than the minimum, replace the valve

Fig. 186: Identifying Valve Head Margin Thickness
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e

Check the valve overall length

Standard overall length: 95.05 mm (3.74 in.)

Minimum overall length: 94.55 mm (3.72 in.)

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra

If the overall length is less than the minimum, replace the valve

Fig. 187: Identifying Valve Overall Length
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

f

Check the surface of the valve stem tip for wear

If the valve stem tip is worn, resurface the tip with a grinder or replace the valve

Fig. 188: Checking Surface Of Valve Stem Tip For Wear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4

INSPECT EXHAUST VALVE

a

Clean the valves

1

Using a gasket scraper, chip off any carbon from the valve head

2

Using a wire brush, thoroughly clean the valve

NOTE:

Be careful not to grind off more than the minimum length.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra

Fig. 189: Cleaning Exhaust Valves Using Gasket Scraper & Wire Brush
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Using a micrometer, measure the diameter of the valve stem

Standard valve stem diameter: 5.465 to 5.480 mm (0.215 to 0.216 in.)

Fig. 190: Measuring Diameter Of Valve Stem Using Micrometer
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Check the valve face angle

1

Grind the valve sufficiently to remove pits and carbon

2

Check that the valve is ground to the correct valve face angle

Standard valve face angle: 44.5°

If the valve face is worn, replace the valve

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra