Toyota Tundra. Manual — part 1873

Fig. 191: 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. 192: Identifying Valve Head Margin Thickness
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e

Check the valve overall length

Standard overall length: 95.10 mm (3.744 in.)

Minimum overall length: 94.60 mm (3.724 in.)

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

Fig. 193: 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

2009 Toyota Tundra

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

Fig. 194: Checking Surface Of Valve Stem Tip For Wear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

5

INSPECT INTAKE VALVE GUIDE BUSH

a

Using a caliper gauge, measure the inside diameter of the guide bush

Standard bush inside diameter: 5.510 to 5.530 mm (0.217 to 0.218 in.)

Fig. 195: Measuring Inside Diameter Of Guide Bush Using Caliper Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Subtract the valve stem diameter measurement from the guide bush inside diameter measurement

Standard oil clearance: 0.025 to 0.060 mm (0.000984 to 0.00236 in.)

Maximum oil clearance: 0.08 mm (0.00314 in.)

If the oil clearance is greater than the maximum, replace the valve and guide bush

6

INSPECT EXHAUST VALVE GUIDE BUSH

a

Using a caliper gauge, measure the inside diameter of the guide bush

Standard bush inside diameter: 5.510 to 5.530 mm (0.217 to 0.218 in.)

NOTE:

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

2009 Toyota Tundra

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

Fig. 196: Measuring Inside Diameter Of Guide Bush Using Caliper Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Subtract the valve stem diameter measurement from the guide bush inside diameter measurement

Standard oil clearance: 0.030 to 0.065 mm (0.00118 to 0.00256 in.)

Maximum oil clearance: 0.10 mm (0.00394 in.)

If the oil clearance is greater than the maximum, replace the valve and guide bush

7

INSPECT INTAKE VALVE SEAT

a

Apply a light coat of Prussian blue to the valve face

b

Lightly press the valve against the seat

HINT:

Do not rotate the valve while pressing it

Fig. 197: Checking Valve Seating Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Check the valve face and seat

1

Check that the contact surfaces of the valve seat and valve face are in the middle area of their
respective surfaces, with the width between 1 0 to 1 4 mm (0 0394 to 0 0551 in ) If not,
correct the valve seat

2

Check that the contact surfaces of the valve seat and valve face are even around the entire
valve seat

2009 Toyota Tundra

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

If not, correct the valve seat

8

INSPECT EXHAUST VALVE SEAT

a

Apply a light coat of Prussian blue to the valve face

b

Lightly press the valve against the seat

HINT:

Do not rotate the valve while pressing it

Fig. 198: Checking Valve Seating Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Check the valve face and seat

1

Check that the contact surfaces of the valve seat and valve face are in the middle area of their
respective surfaces, with the width between 1 0 to 1 4 mm (0 0394 to 0 0551 in ) If not,
correct the valve seat

2

Check that the contact surfaces of the valve seat and valve face are even around the entire
valve seat

If not, correct the valve seat

9

INSPECT COMPRESSION SPRING

a

Using steel squares, measure the deviation of the spring

Maximum deviation: 2.0 mm (0.0787 in.)

If the deviation is greater than the maximum, replace the valve spring

2009 Toyota Tundra

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