TOYOTA SIENNA 2007 Service Repair Manual

EM–1142GR-FE ENGINE MECHANICAL – ENGINE UNIT
EM
(b) Using a steel square, measure the deviation of the
inner compression spring.
Maximum deviation:
1.0 mm (0.039 in.)
Maximum angle (reference):
2
If the deviation is greater than the maximum,
replace the inner compression spring.
26. INSPECT VALVE GUIDE BUSH OIL CLEARANCE
(a) Using a caliper gauge, measure the inside diameter
of the valve guide bush.
Bush inside diameter:
5.510 to 5.530 mm (0.2169 to 0.2177 in.)
(b) Subtract the valve stem diameter measurement
from the valve guide bush inside diameter
measurement.
Standard clearance
Maximum oil clearance
For intake side:
If the clearance is greater than the maximum,
replace the intake valve and intake valve guide
bush.
For exhaust side:
If the clearance is greater than the maximum,
replace the exhaust valve and exhaust valve guide
bush.
27. INSPECT CAMSHAFT THRUST CLEARANCE
(a) Inspect the bank 1 camshaft thrust clearance.
(1) Install the bank 1 camshaft (See page EM-
126).
(2) Using a dial indicator, measure the thrust
clearance while moving the camshaft back and
forth.
Standard thrust clearance:
0.08 to 0.13 mm (0.0031 to 0.0051 in.)
Maximum thrust clearance:
0.15 mm (0.006 in.)
If the thrust clearance is greater than the
maximum, replace the cylinder head. If the
thrust surface is damaged, replace the
camshaft.
A094933E01
A120707Item Clearance
Intake 0.025 to 0.060 mm (0.0010 to 0.0024 in.)
Exhaust 0.030 to 0.065 mm (0.0012 to 0.0026 in.)
Item Clearance
Intake 0.08 mm (0.0032 in.)
Exhaust 0.10 mm (0.0039 in.)
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2GR-FE ENGINE MECHANICAL – ENGINE UNITEM–115
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(b) Inspect the bank 2 camshaft thrust clearance.
(1) Install the bank 2 camshaft (See page EM-
126).
(2) Using a dial indicator, measure the thrust
clearance while moving the camshaft back and
forth.
Standard thrust clearance:
0.08 to 0.13 mm (0.0031 to 0.0051 in.)
Maximum thrust clearance:
0.15 mm (0.006 in.)
If the thrust clearance is greater than the
maximum, replace the cylinder head. If the
thrust surface is damaged, replace the
camshaft.
28. INSPECT CAMSHAFT OIL CLEARANCE
(a) Clean the camshaft bearing caps, camshaft housing
and camshaft journals.
(b) Place the camshafts on the camshaft housing.
(c) Lay a strip of Plastigage across each of the
camshaft journals.
(d) Install the camshaft bearing caps (See page EM-
126).
NOTICE:
Do not turn the camshaft.
(e) Remove the camshaft bearing caps (See page EM-
76).
(f) Measure the Plastigage at its widest point.
Standard oil clearance
Maximum oil clearance
If the oil clearance is greater than the maximum,
replace the camshaft. If necessary, replace the
camshaft housing.
(g) Clean the camshaft bearing caps, camshaft housing
and camshaft journals.
(h) Place the camshafts on the camshaft housing.
A120715E01
A129756E03
Item Oil Clearance
No. 1 journal 0.040 to 0.079 mm (0.0016 to 0.0031 in.)
Other journals 0.025 to 0.062 mm (0.00098 to 0.0024 in.)
Item Oil Clearance
No. 1 journal 0.10 mm (0.0039 in.)
Other journals 0.09 mm (0.0035 in.)

EM–1162GR-FE ENGINE MECHANICAL – ENGINE UNIT
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(i) Lay a strip of Plastigage across each of the
camshaft journals.
(j) Install the bearing caps (See page EM-126).
NOTICE:
Do not turn the camshaft.
(k) Remove the bearing caps (See page EM-76).
(l) Measure the Plastigage at its widest point.
Standard oil clearance
Maximum oil clearance
If the oil clearance is greater than the maximum,
replace the camshaft. If necessary, replace the
camshaft housing.
29. INSPECT CONNECTING ROD THRUST CLEARANCE
(a) Install the connecting rod cap (See page EM-126).
(b) Using a dial indicator, measure the thrust clearance
while moving the connecting rod back and forth.
Standard thrust clearance:
0.15 to 0.40 mm (0.0059 to 0.0157 in.)
Maximum thrust clearance:
0.50 mm (0.020 in.)
If the thrust clearance is greater than the maximum,
replace the connecting rod assemblies as
necessary. If necessary, replace the crankshaft.
30. INSPECT CONNECTING ROD OIL CLEARANCE
(a) Clean the crank pin and bearing.
(b) Check the crank pin and bearing for pitting and
scratches.
A120717E01
A129758E03
Item Oil Clearance
No. 1 journal 0.040 to 0.079 mm (0.0016 to 0.0031 in.)
Other journals 0.025 to 0.062 mm (0.00098 to 0.0024 in.)
Item Oil Clearance
No. 1 journal 0.10 mm (0.0039 in.)
Other journals 0.09 mm (0.0035 in.)
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2GR-FE ENGINE MECHANICAL – ENGINE UNITEM–117
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(c) Lay a strip of Plastigage on the crank pin.
(d) Check that the front mark of the connecting rod cap
is facing forward.
(e) Install the connecting rod cap (See page EM-126).
NOTICE:
Do not turn the crankshaft.
(f) Remove the 2 bolts and connecting rod cap (See
page EM-76).
(g) Measure the Plastigage at its widest point.
Standard oil clearance:
0.045 to 0.067 mm (0.0018 to 0.0026 in.)
Maximum oil clearance:
0.070 mm (0.0028 in.)
If the oil clearance is greater than the maximum,
replace the connecting rod bearings. If necessary,
inspect the crankshaft.
HINT:
If replacing a bearing, replace it with one that has
the same number as its respective connecting rod
cap. Each bearing's standard thickness is indicated
by a 1, 2, 3 or 4 mark on its surface.
Connecting rod diameter
Connecting rod bearing center wall thickness
Crankshaft pin diameter:
52.992 to 53.000 mm (2.0863 to 2.0866 in.)
NOTICE:
Completely remove the Plastigage after the
measurement.
A131814E01
A131815E01
A131817E02
Mark Diameter
1 56.000 to 56.006 mm (2.2047 to 2.2050 in.)
2 56.007 to 56.012 mm (2.2050 to 2.2052 in.)
3 56.013 to 56.018 mm (2.2052 to 2.2054 in.)
4 56.019 to 56.024 mm (2.2055 to 2.2057 in.)
Mark Thickness
1 1.481 to 1.484 mm (0.0583 to 0.0584 in.)
2 1.484 to 1.487 mm (0.0584 to 0.0585 in.)
3 1.487 to 1.490 mm (0.0585 to 0.0587 in.)
4 1.490 to 1.493 mm (0.0587 to 0.0588 in.)

EM–1182GR-FE ENGINE MECHANICAL – ENGINE UNIT
EM
31. INSPECT CRANKSHAFT THRUST CLEARANCE
(a) Install the crankshaft bearing cap (See page EM-
126).
(b) Using a dial indicator, measure the thrust clearance
while prying the crankshaft back and forth with a
screwdriver.
Standard thrust clearance:
0.04 to 0.24 mm (0.0016 to 0.0094 in.)
Maximum thrust clearance:
0.30 mm (0.0118 in.)
If the thrust clearance is greater than the maximum,
replace the thrust washers as a set. If necessary,
replace the crankshaft.
Thrust washer thickness:
2.43 to 2.48 mm (0.0957 to 0.0976 in.)
32. INSPECT CYLINDER BLOCK FOR WARPAGE
(a) Using a precision straight edge and feeler gauge,
measure the warpage of the contact surface of the
cylinder head gasket.
Maximum warpage:
0.07 mm (0.0028 in.)
If the warpage is greater than the maximum, replace
the cylinder block.
33. INSPECT CYLINDER BORE
(a) Visually check the cylinder for vertical scratches.
If deep scratches are present, rebore all the 6
cylinders. If necessary, replace the cylinder block.
A131818
A131819
A131820

2GR-FE ENGINE MECHANICAL – ENGINE UNITEM–119
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(b) 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 (3.7008 to 3.7013 in.)
Maximum diameter:
94.200 mm (3.7087 in.)
If the average diameter of 4 positions is greater than
the maximum, replace the cylinder block.
34. INSPECT PISTON SUB-ASSEMBLY WITH PIN
(a) Using a micrometer, measure the piston diameter at
right angles to the piston center line where the
distance from the piston end is as specified.
Distance:
9.8 mm (0.3858 in.)
Standard diameter:
93.960 to 93.980 mm (3.6992 to 3.7000 in.)
Maximum diameter:
93.830 mm (3.6941 in.)
35. INSPECT PISTON OIL CLEARANCE
(a) Measure the cylinder bore diameter in the thrust
directions.
(b) Subtract the piston diameter measurement from the
cylinder bore diameter measurement.
Standard oil clearance:
0.020 to 0.052 mm (0.0008 to 0.0020 in.)
Maximum oil clearance:
0.060 mm (0.0024 in.)
If the oil clearance is greater than the maximum,
replace all the pistons. If necessary, replace the
cylinder block.
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A131821E02

EM–1202GR-FE ENGINE MECHANICAL – ENGINE UNIT
EM
36. INSPECT RING GROOVE CLEARANCE
(a) Using a feeler gauge, measure the clearance
between a new piston ring and the wall of the ring
groove.
Ring groove clearance
If the clearance is not as specified, replace the
piston.
37. 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.
(c) Using a feeler gauge, measure the end gap.
Standard end gap
Maximum end gap
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 the
6 cylinders or replace the cylinder block.
38. INSPECT PISTON PIN OIL CLEARANCE
(a) Using a caliper gauge, measure the inside diameter
of the piston pin hole.
Piston pin hole inside diameter
A131822
Item Clearance
No. 1 0.020 to 0.070 mm (0.0008 to 0.0028 in.)
No. 2 0.020 to 0.060 mm (0.0008 to 0.0024 in.)
Oil 0.070 to 0.150 mm (0.0028 to 0.0059 in.)
A106218E02
A109687
Item End Gap
No. 1 0.25 to 0.35 mm (0.0098 to 0.0138 in.)
No. 2 0.50 to 0.60 mm (0.0197 to 0.0236 in.)
Oil 0.10 to 0.40 mm (0.0039 to 0.0157 in.)
Item End Gap
No. 1 0.50 mm (0.0197 in.)
No. 2 0.85 mm (0.0335 in.)
Oil 0.60 mm (0.0236 in.)
A131823
Mark Diameter
A 22.001 to 22.004 mm (0.8662 to 0.8663 in.)
B 22.004 to 22.007 mm (0.8663 to 0.8664 in.)
C 22.007 to 22.010 mm (0.8664 to 0.8665 in.)

2GR-FE ENGINE MECHANICAL – ENGINE UNITEM–121
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(b) Using a micrometer, measure the piston pin
diameter.
Piston pin diameter
(c) Subtract the piston pin diameter measurement from
the piston pin hole diameter measurement.
Standard oil clearance:
0.001 to 0.007 mm (0.00004 to 0.00028 in.)
Maximum oil clearance:
0.015 mm (0.0006 in.)
If the oil clearance is greater than the maximum,
replace the piston and piston pin as a set.
(d) Using a caliper gauge, measure the inside diameter
of the connecting rod bushing.
Bushing inside diameter
(e) Subtract the piston pin diameter measurement from
the bushing inside diameter measurement.
Standard oil clearance:
0.005 to 0.011 mm (0.0002 to 0.0004 in.)
Maximum oil clearance:
0.030 mm (0.0012 in.)
If the oil clearance is greater than the maximum,
replace the bushing. If necessary, replace the
connecting rod and piston pin as a set.
A106219E02
Mark Diameter
A 21.997 to 22.000 mm (0.8660 to 0.8661 in.)
B 22.000 to 22.003 mm (0.8661 to 0.8663 in.)
C 22.003 to 22.006 mm (0.8663 to 0.8664 in.)
A109689
Mark Diameter
A 22.005 to 22.008 mm (0.8663 to 0.8665 in.)
B 22.009 to 22.011 mm (0.8665 to 0.8666 in.)
C 22.012 to 22.014 mm (0.8666 to 0.8667 in.)
A131824E01

EM–1222GR-FE ENGINE MECHANICAL – ENGINE UNIT
EM
39. INSPECT CONNECTING ROD
(a) Using a rod aligner and feeler gauge, check the
connecting rod alignment.
(1) Check for out-of-alignment.
Maximum out-of-alignment:
0.05 mm (0.0020 in.) per 100 mm (3.94 in.)
If the out-of-alignment is greater than the
maximum, replace the connecting rod
assembly.
(2) Check for twist.
Maximum twist:
0.15 mm (0.0059 in.) per 100 mm (3.94 in.)
If the twist is greater than the maximum,
replace the connecting rod assembly.
40. INSPECT CONNECTING ROD BOLT
(a) Using vernier calipers, measure the tension portion
diameter of the bolt.
Standard diameter:
7.2 to 7.3 mm (0.284 to 0.287 in.)
Minimum diameter:
7.0 mm (0.276 in.)
If the diameter is less than the minimum, replace the
bolt.
41. INSPECT CRANKSHAFT
(a) Inspect for circle runout.
(1) Clean the crank journal.
(2) Place the crankshaft on V-blocks.
(3) Using a dial indicator, measure the circle runout
at the center journal.
Maximum circle runout:
0.06 mm (0.0024 in.)
If the circle runout is greater than the
maximum, replace the crankshaft.
A109690
A109691E01
A109692
A109693

2GR-FE ENGINE MECHANICAL – ENGINE UNITEM–123
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(b) Inspect the main journals.
(1) Using a micrometer, measure the diameter of
each main journal.
Standard journal diameter:
60.988 to 61.000 mm (2.4011 to 2.4016 in.)
If the diameter is not as specified, check the oil
clearance. If necessary, replace the crankshaft.
(2) Check each main journal for taper and out-of-
round as shown in the illustration.
Maximum taper and out-of-round:
0.02 mm (0.0008 in.)
If the taper and out-of-round is greater than the
maximum, replace the crankshaft.
(c) Inspect the crank pin.
(1) Using a micrometer, measure the diameter of
each crank pin.
Crankshaft pin diameter:
52.992 to 53.000 mm (2.0863 to 2.0866 in.)
If the diameter is not as specified, check the oil
clearance. If necessary, replace the crankshaft.
(2) Check each crank pin for taper and out-of-
round as shown in the illustration.
Maximum taper and out-of-round:
0.02 mm (0.0008 in.)
If the taper and out-of-round is greater than the
maximum, replace the crankshaft.
42. INSPECT CRANKSHAFT OIL CLEARANCE
(a) Check the crank journal and bearing for pitting and
scratches.
(b) Install the crankshaft bearing (See page EM-126).
(c) Place the crankshaft on the cylinder block.
(d) Lay a strip of Plastigage across each journal.
(e) Examine the front marks and numbers and install
the bearing caps on the cylinder block.
HINT:
A number is marked on each main bearing cap to
indicate the installation position.
(f) Install the main bearing cap (See page EM-126).
NOTICE:
Do not turn the crankshaft.
(g) Remove the main bearing caps (See page EM-76).
(h) Measure the Plastigage at its widest point.
Standard oil clearance:
0.026 to 0.047 mm (0.0010 to 0.0019 in.)
Maximum oil clearance:
0.050 mm (0.0020 in.)
If the oil clearance is greater than the maximum,
replace the bearings. If necessary, replace the
crankshaft.
NOTICE:
Completely remove the Plastigage after the
measurement.
A109694
A109695
A122109E01
A131830E01