Toyota Tundra. Manual — part 1874

Fig. 199: Measuring Deviation Of Spring Using Steel Squares
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

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

Standard free length: 51.29 mm (2.02 in.)

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

Fig. 200: Measuring Free Length Of Spring Using Vernier Caliper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Using a spring tester, measure the tension of the valve spring when it is compressed to the specified
installation length

Standard installed tension: 210 to 226 N (21 to 23 kgf, 47.2 to 50.7 lbf) at 33.4 mm (1.31 in.)

If the installed tension is not as specified, replace the valve spring

2009 Toyota Tundra

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

Fig. 201: Measuring Tension Of Valve Spring At Specified Installed Length
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

10

INSPECT VALVE LIFTER

a

Using a micrometer, measure the lifter diameter at a position 12 3 to 12 7 mm (0 484 to 0 500 in )
from the top surface

Standard lifter diameter: 30.968 to 30.976 mm (1.2192 to 1.2195 in.)

Fig. 202: Measuring Lifter Diameter Using Micrometer
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Using a caliper gauge, measure the lifter bore diameter of the cylinder head

Standard lifter bore diameter: 31.000 to 31.016 mm (1.220 to 1.221 in.)

Fig. 203: Measuring Lifter Bore Diameter Of Cylinder Head Using Caliper Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Subtract the lifter diameter measurement from the lifter bore diameter measurement

Standard oil clearance: 0.024 to 0.050 mm (0.000945 to 0.00196 in.)

Maximum oil clearance: 0.07 mm (0.00276 in.)

If the oil clearance is greater than the maximum, replace the lifter If necessary, replace the cylinder
head

2009 Toyota Tundra

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

11

INSPECT CAMSHAFT THRUST CLEARANCE

a

Inspect the clearance on the intake side

1

Install the camshaft

2

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

Fig. 204: Using Dial Indicator To Measure Thrust Clearance While Moving Camshaft
Back & Forth (Intake)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard thrust clearance: 0 to 0.040 mm (0 to 0.00157 in.)

Maximum thrust clearance: 0.12 mm (0.00472 in.)

If the thrust clearance is greater than the maximum, replace the camshaft If necessary,
replace the bearing caps and cylinder head as a set

3

Remove the camshaft

b

Inspect the clearance on the exhaust side

1

Install the camshaft

2

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

Fig. 205: Using Dial Indicator To Measure Thrust Clearance While Moving Camshaft
Back & Forth (Exhaust)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

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

Standard thrust clearance: 0.030 to 0.070 mm (0.00118 to 0.00276 in.)

Maximum thrust clearance: 0.10 mm (0.00394 in.)

If the thrust clearance is greater than the maximum, replace the camshaft

If necessary, replace the bearing caps and cylinder head as a set

3

Remove the camshaft

12

INSPECT CAMSHAFT GEAR BACKLASH

a

for Bank 1:

1

Install the No 3 camshaft and No 4 camshaft without installing the camshaft sub-gear and
front bearing cap

Fig. 206: Using Dial Indicator To Measure Backlash (Bank 1)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2

Using a dial indicator, measure the backlash

Standard backlash: 0.020 to 0.200 mm (0.000787 to 0.00787 in.)

Maximum backlash: 0.30 mm (0.0118 in.)

If the backlash is greater than the maximum, replace the drive gear and No 4 camshaft

3

Remove the No 3 camshaft and No 4 camshaft

4

Remove the camshaft timing tube from the No 3 camshaft

5

Remove the drive gear from the camshaft timing tube

b

for Bank 2:

1

Install the No 1 camshaft and No 2 camshaft without installing the camshaft sub-gear and
front bearing cap

2

Using a dial indicator, measure the backlash

2009 Toyota Tundra

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