Toyota Tundra. Manual — part 1821

Fig. 306: Aligning Knock Pin Hole In Camshaft Timing Gear With Knock Pin Of Camshaft
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Confirm the camshaft timing gear is locked

d

Release the lock pin

1

Cover 4 oil paths of the cam journal with vinyl tape as shown below

HINT:

One of the 2 grooves on the cam journal is for retard side paths (upper) and the other is for
advance side paths (lower) Each groove has 2 oil paths Plug one of the oil paths for each
groove with rubber pieces before wrapping the cam journal with tape

2

Prick a hole in the tape placed on the advance side path Prick a hole in the retard side path
on the opposite side of that advance side path as shown below

Fig. 307: Covering Oil Paths Of Cam Journal With Vinyl Tape
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra

3

Apply about 200 kPa (2 0 kgf/cm

2

, 28 psi) of air pressure to the two broken paths (the

advance side path and the retard side path)

Fig. 308: Identifying Air Pressure To Broken Paths
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4

Confirm that the camshaft timing gear rotates in the advance direction when reducing the air
pressure applied to the retard path

HINT:

When the lock pin is released, the camshaft timing gear rotates in the advance direction

5

When the camshaft timing gear comes to the most advanced position, release the air pressure
from the retard side path, and then release the air pressure from the advance side path

Fig. 309: Rotating Camshaft Timing Gear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e

Check for smooth rotation

1

Except the position where the lock pin meets at the most retard angle, turn the camshaft

NOTE:

Cover the paths with a cloth to avoid oil splashing.

NOTE:

The camshaft timing gear occasionally shifts to the retard side
abruptly if air compression of the advanced side path is
released first. This often results in the breakage of the lock pin.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra

timing gear back and forth and check the movable range and that there is no disturbance

Standard: Movable smoothly in the range of about 31°

f

Check the lock in the most retarded position

1

Confirm that the camshaft timing gear is locked at the most retarded position

g

Remove the set bolt and camshaft timing gear

Fig. 310: Identifying Set Bolt & Camshaft Timing Gear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

16

INSPECT CONNECTING ROD BOLT

a

Using a vernier caliper, measure the tension portion diameter of the bolt

Standard diameter: 7.2 to 7.3 mm (0.283 to 0.287 in.)

Minimum diameter: 7.0 mm (0.276 in.)

If the diameter is less than the minimum, replace the connecting rod bolt

Fig. 311: Identifying Connecting Rod Bolt Measuring Point
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

17

INSPECT CRANKSHAFT BEARING CAP SET BOLT

NOTE:

Be sure to perform this check by hand, instead of with air
pressure.

NOTE:

Be sure not to remove the other 3 bolts.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra

a

Using a vernier caliper, measure the tension portion diameter of the bolt

Standard diameter: 10.0 to 10.2 mm (0.394 to 0.402 in.)

If the diameter is less than the minimum, replace the crankshaft bearing cap set bolt

Fig. 312: Measuring Tension Portion Diameter Of Bolt Using Vernier Caliper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

18

INSPECT CYLINDER BLOCK FOR FLATNESS

a

Using a precision straight edge and feeler gauge, measure the warpage of the contact surface of the
cylinder head gasket

Maximum warpage: 0.05 mm (0.00197 in.)

If the warpage is greater than the maximum, replace the cylinder block

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (1GR-FE) - Tundra