Toyota Tundra. Manual — part 2212

Fig. 106: Identifying Cylinders Block
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. INSPECT CYLINDER BORE

a. Using a cylinder gauge, measure the cylinder bore diameter at positions A and B in the thrust and

axial directions.

Standard diameter:

94.000 to 94.012 mm (3.700 to 3.701 in.)

Maximum diameter:

94.200 mm (3.709 in.)

If the diameter is more than the maximum, replace the cylinder block.

Fig. 107: Measuring Cylinder Bore Diameter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. INSPECT RING GROOVE CLEARANCE

a. Using a feeler gauge, measure the clearance between a new piston ring and the wall of the ring

groove.

Standard ring groove clearance

2009 Toyota Tundra

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

STANDARD RING GROOVE CLEARANCE SPECIFICATION

Fig. 108: Measuring Clearance Between Piston Ring And Wall Of Ring Groove
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the clearance is not as specified, replace the piston.

4. INSPECT PISTON RING END GAP

a. Insert the piston ring into the cylinder bore.

b. Using a piston, push the piston ring a little beyond the bottom of the ring travel, 60 mm (2.36 in.)

from the top of the cylinder block.

Item

Specified Condition

No. 1 0.020 to 0.070 mm (0.000787 to 0.00276 in.)
No. 2 0.020 to 0.060 mm (0.000787 to 0.00236 in.)

Oil

0.070 to 0.145 mm (0.00276 to 0.00571 in.)

2009 Toyota Tundra

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

Fig. 109: Checking Piston Ring End Gap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Using a feeler gauge, measure the end gap.

Standard end gap

STANDARD END GAP SPECIFICATION

Item

Specified Condition

No. 1 0.23 to 0.33 mm (0.00906 to 0.0130 in.)
No. 2 0.40 to 0.50 mm (0.0157 to 0.0197 In.)

Oil 0.10 to 0.40 mm (0.00394 to 0.0157 in.)

2009 Toyota Tundra

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

Fig. 110: Checking Piston Ring End Gap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Maximum end gap

MAXIMUM END GAP SPECIFICATION

If the end gap is more than the maximum, replace the piston ring. If the end gap is more than the
maximum even with a new piston ring, replace the cylinder block.

5. INSPECT PISTON SUB-ASSEMBLY WITH PIN

a. Using a micrometer, measure the piston diameter at a position that is 15.0 mm (0.591 in.) from the

bottom of the piston (refer to the illustration ).

Standard diameter:

93.950 to 93.960 mm (3.6988 to 3.6992 in.)

Minimum diameter:

93.815 mm (3.6935 in.)

If the diameter is less than the minimum, replace the piston.

Item Specified Condition

No. 1 0.42 mm (0.0165 in.)
No. 2 0.55 mm (0.0217 in.)

Oil 0.45 mm (0.0177 in.)

2009 Toyota Tundra

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