Toyota Tundra. Manual — part 1823

e

Subtract the piston pin diameter measurement from the piston pin hole diameter measurement

Standard oil clearance: 0.001 to 0.007 mm (0.0000394 to 0.000276 in.)

Maximum oil clearance: 0.040 mm (0.00157 in.)

If the oil clearance is greater than the maximum, replace the piston and piston pin as a set

f

Subtract the piston pin diameter measurement from the bush inside diameter measurement

Standard oil clearance: 0.005 to 0.011 mm (0.000197 to 0.000433 in.)

Maximum oil clearance: 0.050 mm (0.00197 in.)

If the oil clearance is greater than the maximum, replace the bush (see REPLACEMENT ) If
necessary, replace the connecting rod and piston pin as a set

23

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

RING GROOVE CLEARANCE SPECIFICATION

Fig. 320: Measuring Clearance Between Piston Ring & Wall Of Ring Groove Using Feeler
Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the clearance is not as specified, replace the piston

Item

Specified Condition

No 1

0 02 to 0 07 mm (0 000787 to

0 00276 in )

No 2

0 02 to 0 06 mm (0 000787 to

0 00236 in )

Oil

0 07 to 0 15 mm (0 00276 to

0 00590 in )

2009 Toyota Tundra

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

24

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, 110 mm (4 33 in )
from the top of the cylinder block

Fig. 321: Inserting Piston Ring Into Cylinder Bore
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c

Using a feeler gauge, measure the end gap

Standard end gap

END GAP SPECIFICATION

Fig. 322: Measuring End Gap Using Feeler Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Maximum end gap

Item

Specified Condition

No 1

0 30 to 0 40 mm (0 0118 to

0 0157 in )

No 2

0 40 to 0 50 mm (0 0157 to

0 0197 in )

Oil (side rail)

0 10 to 0 40 mm (0 00394 to

0 0157 in )

2009 Toyota Tundra

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

END GAP SPECIFICATION

If the end gap is greater than the maximum, replace the piston ring If the end gap is greater than
the maximum even with a new piston ring, rebore all 6 cylinders or replace the cylinder block sub-
assembly

25

INSPECT CONNECTING ROD SUB-ASSEMBLY

a

Using a rod aligner and feeler gauge, check the connecting rod alignment

1

Check for bend

Maximum bend: 0.05 mm (0.00197 in.) per 100 mm (3.94 in.)

If the bend is greater than the maximum, replace the connecting rod sub-assembly

Fig. 323: Checking Connecting Rod For Bend Using Rod Aligner & Feeler Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2

Check for twist

Maximum twist: 0.15 mm (0.00591 in.) per 100 mm (3.94 in.)

If the twist is greater than the maximum, replace the connecting rod sub-assembly

Item

Specified Condition

No 1

1 0 mm (0 0394 in )

No 2

1 1 mm (0 0433 in )

Oil (side rail) 1 0 mm (0 0394 in )

2009 Toyota Tundra

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

Fig. 324: Checking Connecting Rod For Twist Using Rod Aligner & Feeler Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

26

INSPECT CRANKSHAFT

a

Using a dial indicator and V-blocks, measure the runout as shown below

Maximum circle runout: 0.06 mm (0.00236 in.)

If the circle runout is greater than the maximum, replace the crankshaft

Fig. 325: Measuring Crankshaft Runout Using Dial Indicator & V-Blocks
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Using a micrometer, measure the diameter of each main journal

Standard diameter: 71.988 to 72.000 mm (2.8342 to 2.8346 in.)

If the diameter is not as specified, check the oil clearance If necessary, replace the crankshaft

c

Check each main journal for taper and out-of-round as shown below

Maximum taper and out-of-round: 0.02 mm (0.000787 in.)

If the taper and out-of-round is greater than the maximum, replace the crankshaft

Fig. 326: Using Micrometer To Measure Diameter Of Each Main Journal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d

Using a micrometer, measure the diameter of each crank pin

2009 Toyota Tundra

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