Toyota Tundra. Manual — part 2203

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

7. INSPECT INTAKE VALVE SEAT

Fig. 52: Identifying Intake Valve Seat
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Apply a light coat of Prussian blue to the valve face.

b. Lightly press the valve face against the valve seat.

HINT:

Do not rotate the valve while pressing the valve.

c. Check the valve face and valve 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 1.1 to 1.5 mm (0.0433 to 0.0591 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.

8. INSPECT EXHAUST VALVE SEAT

Item

Specified Condition

Intake 0.08 mm (0.00315 in.)

Exhaust 0.10 mm (0.00394 in.)

2009 Toyota Tundra

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

Fig. 53: Identifying Exhaust Valve Seat
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Apply a light coat of Prussian blue to the valve face.

b. Lightly press the valve face against the valve seat.

HINT:

Do not rotate the valve while pressing the valve.

c. Check the valve face and valve 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 1.1 to 1.5 mm (0.0433 to 0.0591 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 CYLINDER HEAD SUB-ASSEMBLY

a. Using a precision straightedge and feeler gauge, measure the warpage of the contact surfaces of the

cylinder block and manifold.

Standard warpage

STANDARD WARPAGE SPECIFICATIONS

Item

Specified Condition

Cylinder block side 0.05 mm (0.00197 in.)

Intake manifold side 0.08 mm (0.00315 in.)

Exhaust manifold side 0.05 mm (0.00197 In.)

2009 Toyota Tundra

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

Fig. 54: Measuring Warpage Of Contact Surfaces Of Cylinder Block And Manifold
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Maximum warpage:

0.10 mm (0.00394 in.)

If the warpage is more than the maximum, replace the cylinder head.

b. Using a dye penetrant, check the intake ports, exhaust ports and cylinder surface for cracks. If

cracked, replace the cylinder head.

Fig. 55: Checking Cylinder Surface For Cracks
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

REPLACEMENT

1. REPLACE INTAKE VALVE GUIDE BUSH

a. Heat the cylinder head to approximately 80 to 100°C (176 to 212°F).

b. Place the cylinder head on wooden blocks.

c. Using SST and a hammer, tap out the valve guide bush.

SST 09201-10000 (09201-01050), 09950-70010 (09951-07100)

2009 Toyota Tundra

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

Fig. 56: Tapping Out Valve Guide Bush
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d. Using a caliper gauge, measure the bush bore diameter of the cylinder head side.

Standard cylinder bore diameter:

10.285 to 10.306 mm (0.405 to 0.406 in.)

If the bush bore diameter of the cylinder head is between 10.285 to 10.306 mm (0.405 to 0.406 in.),
proceed to the next step. If the bush bore diameter of the cylinder head is 10.356 mm (0.408 in.) or
more, replace the cylinder head.

Fig. 57: Measuring Bush Bore Diameter Of Cylinder Head Side
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e. Select a new guide bush (STD or O/S 0.05), and measure its diameter.

f. Machine the bush bore diameter of the cylinder head side to the diameter of the selected guide

bush.

Bush bore diameter

BUSH BORE DIAMETER SPECIFICATION

Bush Size

Specified Condition

STD

10.333 to 10.344 mm (0.4068 to 0.4072 in.)

O/S 0.05 10.383 to 10.394 mm (0.4088 to 0.4092 in.)

2009 Toyota Tundra

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