Toyota Tundra. Manual — part 1994

Fig. 42: Checking Camshaft Thrust Clearance
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Inspect the RH side camshafts

1

Install the RH side camshafts

2

Using a dial indicator, measure the thrust clearance while moving the camshaft back and
forth

Standard thrust clearance: 0.08 to 0.135 mm (0.00315 to 0.00531 in.)

Maximum thrust clearance: 0.15 mm (0.00591 in.)

If the thrust clearance is greater than the maximum, replace the camshaft housing If the
thrust surface is damaged, replace the camshaft

3

INSPECT COMPRESSION SPRING

a

Using a vernier caliper, measure the free length of the inner compression spring

Standard free length: 49.39 mm (1.94 in.)

If the free length is not as specified, replace the spring

Fig. 43: Checking Free Length Of Inner Compression Spring
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Using a steel square, measure the deviation of the inner compression spring

Maximum deviation: 1.0 mm (0.0394 in.)

Maximum angle (reference): 2°

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

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (3UR-FE) - Tundra

Fig. 44: Checking Deviation Of Inner Compression Spring
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4

INSPECT INTAKE VALVE

a

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. 45: Measuring Diameter Of Valve Stem
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Using a vernier caliper, measure the valve head margin thickness

Standard margin thickness: 1.25 mm (0.0492 in.)

Minimum margin thickness: 0.50 mm (0.0197 in.)

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

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (3UR-FE) - Tundra

Fig. 46: Checking Valve Head Margin Thickness
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Using a vernier caliper, measure the valve's overall length

Standard overall length: 105.85 mm (4.17 in.)

Minimum overall length: 105.35 mm (4.15 in.)

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

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (3UR-FE) - Tundra

Fig. 47: Checking Valve's Overall Length
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

5

INSPECT EXHAUST VALVE

a

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. 48: Checking Diameter Of Valve Stem
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Using a vernier caliper, measure the valve head margin thickness

Standard margin thickness: 1.4 mm (0.0551 in.)

Minimum margin thickness: 0.50 mm (0.0197 in.)

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (3UR-FE) - Tundra