Toyota Tundra. Manual — part 1995

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

Fig. 49: 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: 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

Fig. 50: Checking Valve's Overall Length
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

6

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.)

2009 Toyota Tundra

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

Fig. 51: Checking Inside Diameter Of Guide Bush
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

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

Standard oil clearance

STANDARD OIL CLEARANCE SPECIFICATIONS

Maximum oil clearance

MAXIMUM OIL CLEARANCE SPECIFICATIONS

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

7

INSPECT INTAKE VALVE SEAT

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

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 )

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-FE) - Tundra

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

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

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

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

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,

2009 Toyota Tundra

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

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

Fig. 54: Checking 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 greater 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

Item

Specified Condition

Cylinder head lower side 0 05 mm (0 00197 in )

Intake side

0 08 mm (0 00315 in )

Exhaust side

0 05 mm (0 00197 in )

2009 Toyota Tundra

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