Toyota Tundra (2015 year). Manual — part 1712

(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 more than the maximum,

replace the camshaft housing. If the thrust surface is

damaged, replace the camshaft.

(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 more than the maximum, replace the camshaft housing. If the thrust

surface is damaged, replace the camshaft.

3. INSPECT COMPRESSION SPRING

Standard free length:

49.39 mm (1.94 in.)

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

Maximum deviation:

1.0 mm (0.0394 in.)

Maximum angle (reference):

2°

If the deviation is more than the maximum, replace the

spring.

4. INSPECT INTAKE VALVE

3UR-FBE ENGINE MECHANICAL: CYLINDER HEAD: INSPECTIO...

Standard valve stem diameter:

5.470 to 5.485 mm (0.215 to 0.216 in.)

(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.

(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.

5. INSPECT EXHAUST VALVE

Standard valve stem diameter:

5.465 to 5.480 mm (0.215 to 0.216 in.)

(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.)

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

exhaust valve.

3UR-FBE ENGINE MECHANICAL: CYLINDER HEAD: INSPECTIO...

(c) Using a vernier caliper, measure the valve's overall length.

Standard overall length:

110.40 mm (4.35 in.)

Minimum overall length:

109.90 mm (4.33 in.)

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

exhaust valve.

6. INSPECT VALVE GUIDE BUSH OIL CLEARANCE

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.

Standard oil clearance:

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.)

Maximum oil clearance:

ITEM

SPECIFIED CONDITION

Intake

0.08 mm (0.00315 in.)

Exhaust

0.10 mm (0.00394 in.)

If the oil clearance is more than the maximum, replace the

valve and guide bush.

7. INSPECT INTAKE VALVE SEAT

HINT:

Do not rotate the valve while pressing the valve.

(c) Check the valve face and valve seat.

surfaces, with the width between 1.1 to 1.5 mm (0.0433

to 0.0591 in.).

If not, correct the valve seat.

If not, correct the valve seat.

3UR-FBE ENGINE MECHANICAL: CYLINDER HEAD: INSPECTIO...

8. INSPECT EXHAUST VALVE SEAT

HINT:

Do not rotate the valve while pressing the valve.

(c) Check the valve face and valve seat.

surfaces, with the width between 1.1 to 1.5 mm (0.0433

to 0.0591 in.).

If not, correct the valve seat.

If not, correct the valve seat.

9. INSPECT CYLINDER HEAD SUB-ASSEMBLY

Standard warpage:

ITEM

SPECIFIED CONDITION

Cylinder block side

0.05 mm (0.00197 in.)

3UR-FBE ENGINE MECHANICAL: CYLINDER HEAD: INSPECTIO...