Toyota Tundra. Manual — part 1819

a

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

Maximum deviation: 2.0 mm (0.0787 in.)

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

Fig. 294: Measuring Deviation Of Inner Compression Spring Using Steel Square
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

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

Standard free length: 47.80 mm (1.88 in.)

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

Fig. 295: Measuring Free Length Of Inner Compression Spring Using Vernier Caliper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Using a spring tester, measure the tension of the inner compression spring at the standard installed
length

Standard installed tension: 186 to 206 N (19 to 21 kgf, 42 to 46 lbf) at 33.3 mm (1.31 in.)

If the installed tension is not as specified, replace the inner compression spring

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra

Fig. 296: Measuring Tension Of Inner Compression Spring At Standard Installed Length
Using Spring Tester
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

9

INSPECT VALVE GUIDE BUSH OIL CLEARANCE

a

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

Standard bush inside diameter: 5.51 to 5.53 mm (0.217 to 0.218 in.)

b

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

Fig. 297: Measuring Inside Diameter Of Guide Bush Using Caliper Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard oil clearance

OIL CLEARANCE SPECIFICATION

Maximum oil clearance

OIL CLEARANCE SPECIFICATION

Item

Specified Condition

Intake

0 025 to 0 060 mm (0 000984

to 0 00236 in )

Exhaust

0 030 to 0 065 mm (0 00118

to 0 00256 in )

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra

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

10

INSPECT VALVE LIFTER

a

Using a micrometer, measure the valve lifter diameter

Standard valve lifter diameter: 30.966 to 30.976 mm (1.219 to 1.220 in.)

If the result is not as specified, replace the valve lifter

Fig. 298: Measuring Valve Lifter Diameter Using Micrometer
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

11

INSPECT VALVE LIFTER OIL CLEARANCE

a

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

Standard lifter bore diameter: 31.009 to 31.025 mm (1.220 to 1.221 in.)

Fig. 299: Measuring Lifter Bore Diameter Of Cylinder Head Using Caliper Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Subtract the valve lifter diameter measurement (see "INSPECT VALVE LIFTER10" procedure)
from the lifter bore diameter measurement

Standard oil clearance: 0.033 to 0.059 mm (0.00130 to 0.00232 in.)

Item

Specified Condition

Intake 0 08 mm (0 00315 in )

Exhaust 0 10 mm (0 00394 in )

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra

Maximum oil clearance: 0.08 mm (0.00315 in.)

If the oil clearance is greater than the maximum, replace the valve lifter

If necessary, replace the cylinder head

12

INSPECT CAMSHAFT THRUST CLEARANCE

a

Install the camshafts (see REASSEMBLY )

b

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

Standard thrust clearance: 0.04 to 0.09 mm (0.00157 to 0.00354 in.)

Maximum thrust clearance: 0.11 mm (0.00433 in.)

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

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

Fig. 300: Measuring Camshaft Thrust Clearance Using Dial Indicator
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

13

INSPECT CAMSHAFT OIL CLEARANCE

a

Clean the camshaft bearing caps, camshaft bearings and camshaft journals

b

Install the camshaft bearing (see REASSEMBLY )

c

Place the camshafts on the cylinder head

d

Lay a strip of Plastigage across each of the camshaft journals

e

Install the camshaft bearing caps (see REASSEMBLY )

f

Remove the camshaft bearing caps (see DISASSEMBLY )

g

Measure the Plastigage at its widest point

NOTE:

Do not turn the camshafts.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra