Toyota Tundra. Manual — part 2246

Fig. 313: Identifying Flange Bolt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

7. INSPECT NO. 1 CHAIN SUB-ASSEMBLY

a. Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33.1 lbf) as shown in the

illustration.

Fig. 314: Measuring Length Of Pins Using Vernier Caliper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Using a vernier caliper, measure the length of 15 pins.

Maximum chain elongation:

136.9 mm (5.39 in.)

HINT:

Perform the measurement at 3 random places. If the elongation is more than the maximum, replace
the chain.

8. INSPECT NO. 2 CHAIN SUB-ASSEMBLY

a. Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33.1 lbf) as shown in the

illustration.

2009 Toyota Tundra

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

Fig. 315: Measuring Length Of Pins Using Vernier Caliper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Using a vernier caliper, measure the length of 15 pins.

Maximum chain elongation:

137.6 mm (5.42 in.)

HINT:

Perform the measurement at 3 random places. If the elongation is more than the maximum, replace
the chain.

9. INSPECT CRANKSHAFT TIMING SPROCKET RH

a. Wrap the chain around the sprocket.

b. Using a vernier caliper, measure the sprocket diameter with the chain.

Minimum sprocket diameter (with chain):

61.4 mm (2.42 in.)

HINT:

The vernier caliper must contact the chain rollers for the measurement.

If the diameter is less than the minimum, replace the chain and sprocket.

2009 Toyota Tundra

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

Fig. 316: Measuring Crankshaft Timing Sprocket Diameter - RH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

10. INSPECT CRANKSHAFT TIMING SPROCKET LH

a. Wrap the chain around the sprocket.

b. Using a vernier caliper, measure the sprocket diameter with the chain.

Minimum sprocket diameter (with chain):

61.4 mm (2.42 in.)

HINT:

The vernier caliper must contact the chain rollers for the measurement.

If the diameter is less than the minimum, replace the chain and sprocket.

Fig. 317: Measuring Sprocket Diameter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

11. INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY

a. Move the stopper plate upward to release the lock. Push the plunger and check that it moves

smoothly. If necessary, replace the chain tensioner.

2009 Toyota Tundra

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

Fig. 318: Identifying Stopper Plate And Plunger
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

12. INSPECT NO. 2 CHAIN TENSIONER ASSEMBLY

a. Check that the plunger moves smoothly.

b. Measure the worn depth of the chain tensioner.

Maximum depth:

0.9 mm (0.0354 in.)

If the depth is more than the maximum, replace the chain tensioner.

Fig. 319: Identifying Worn Depth Of No. 2 Chain Tensioner
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

13. INSPECT NO. 3 CHAIN TENSIONER ASSEMBLY

a. Check that the plunger moves smoothly.

b. Measure the worn depth of the chain tensioner.

Maximum depth:

0.9 mm (0.0354 in.)

If the depth is more than the maximum, replace the chain tensioner.

2009 Toyota Tundra

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