Toyota Tundra. Manual — part 2033

Fig. 313: Loosening Camshaft Bolt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

o

Remove the camshaft bearing cap (see DISASSEMBLY )

p

Remove the flange bolt and camshaft timing exhaust gear

Fig. 314: 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 the
illustration

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 greater than the maximum,
replace the chain

2009 Toyota Tundra

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

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

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 the
illustration

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 greater than the maximum,
replace the chain

Fig. 316: Measuring Length Of Pins Using Vernier Caliper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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-FE) - Tundra

Fig. 317: 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. 318: Measuring Crankshaft Timing Sprocket Diameter - LH
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-FE) - Tundra

Fig. 319: Checking No. 1 Chain Tensioner Plunger Movement
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 greater than the maximum, replace the chain tensioner

Fig. 320: 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 greater than the maximum, replace the chain tensioner

2009 Toyota Tundra

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