TOYOTA AVALON 2001 Service Repair Manual

EM0ZO-02
P12499
Z09222
P12498
- ENGINE MECHANICALCYLINDER BLOCK
EM-93
1077 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
1. REMOVE GASKET MATERIAL
Using a gasket scraper, remove all the gasket material from the
top surface of the cylinder block.
2. CLEAN CYLINDER BLOCK
Using a soft brush and solvent, thoroughly clean the cylinder
block.
NOTICE:
If the cylinder is washed at high temperatures, the cylinder
liner sticks out beyond the cylinder block, so always wash
the cylinder block at a temperature of 45°C (113°F) or less.
3. INSPECT TOP SURFACE OF CYLINDER BLOCK FOR
FLATNESS
Using a precision straight edge and feeler gauge, measure the
surface contacting the cylinder head gasket for warpage.
Maximum warpage: 0.07 mm (0.0028 in.)
If warpage is greater than maximum, replace the cylinder block.
4. INSPECT CYLINDER FOR VERTICAL SCRATCHES
Visually check the cylinder for vertical scratches.
If deep scratches are present, replace the cylinder block.

Z09220
1
Thrust
Direction
Axial
Direction 1
22
A
B
C10 mm
10 mm (0.39 in.)
(0.39 in.) Front
P12500
P12497
P12507A10532
EM-94
- ENGINE MECHANICALCYLINDER BLOCK
1078 Author
: Date
:
2001 AVALON (RM808U)
5. INSPECT CYLINDER BORE DIAMETER
Using a cylinder gauge, measure the cylinder bore diameter at
positions A, B and C in the thrust and axial directions.
Standard diameter:
87.500 - 87.512 mm (3.4449 - 3.4453 in.)
Maximum diameter: 87.52 mm (3.4457 in.)
If the diameter is greater than maximum, replace the cylinder
block.
6. REMOVE CYLINDER RIDGE
If the wear is less than 0.2 mm (0.008 in.), using a ridge reamer,
grind the top of the cylinder.
7. INSPECT 12 POINTED HEAD MAIN BEARING CAP
BOLTS
Using vernier calipers, measure the tension portion diameter of
the bolt.
Standard diameter:
7.500 - 7.600 mm (0.2953 - 0.2992 in.)
Minimum diameter: 7.20 mm (0.2835 in.)
If the diameter is less than minimum, replace the bolt.
8. CLEAN PISTON
(a) Using a gasket scraper, remove the carbon from the pis-
ton top.

P12491A10534
P12505A10535
A10526
RH Piston
41.2 mm
LH Piston
P12504A10533
- ENGINE MECHANICALCYLINDER BLOCK
EM-95
1079 Author
: Date
:
2001 AVALON (RM808U)
(b) Using a groove cleaning tool or broken ring, clean the pis-
ton ring grooves.
(c) Using solvent and a brush, thoroughly clean the piston.
NOTICE:
Do not use a wire brush.
9. INSPECT PISTON OIL CLEARANCE
(a) Using a micrometer, measure the piston diameter at right
angles to the piston pin center line, 41.2 mm (1.622 in.)
from the piston head.
Piston diameter:
87.453 - 87.467 mm (3.4430 - 3.4436 in.)
(b) Measure the cylinder bore diameter in the thrust direc-
tions. (See step 5.)
(c) Subtract the piston diameter measurement from the cylin-
der bore diameter measurement.
Standard oil clearance:
0.033 - 0.059 mm (0.0013 - 0.0023 in.)
Maximum oil clearance: 0.13 mm (0.0051 in.)
If the oil clearance is greater than maximum, replace all the 6
pistons. If necessary, replace the cylinder block.
HINT:
The shape of the piston varies for the RH and LH banks. The
RH piston is marked with ºRº, the LH piston with ºLº.
10. INSPECT PISTON RING GROOVE CLEARANCE
Using a feeler gauge, measure the clearance between new pis-
ton right and the wall of the ring groove.
Ring groove clearance:
No.10.010 - 0.060 mm (0.0004 - 0.0028 in.)
No.20.020 - 0.060 mm (0.0008 - 0.0024 in.)
If the clearance is not as specified, replace the piston.

P12583
105 mm
EM7639
P12506
Z04012
EM-96
- ENGINE MECHANICALCYLINDER BLOCK
1080 Author
: Date
:
2001 AVALON (RM808U)
11. 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 bot-
tom of the ring travel, 105 mm (4.13 in.) from the top of the
cylinder block.
(c) Using a feeler gauge, measure the end gap.
Standard end gap:
No.10.25 - 0.35 mm (0.0098 - 0.0138 in.)
No.20.35 - 0.45 mm (0.0138 - 0.0177 in.) for G2 mark
0.55 - 0.65 mm (0.0217 - 0.0256 in.) for 2T mark
Oil (Side rail)0.15 - 0.40 mm (0.0059 - 0.0157 in.)
Maximum end gap:
No.10.95 mm (0.0374 in.)
No.21.05 mm (0.0413 in.) for G2 mark
1.25 mm (0.0492 in.) for 2T mark
Oil (Side rail)1.00 mm (0.0394 in.)
If the end gap is greater than maximum, replace the piston ring.
If the end gap is greater than maximum, even with a new piston
ring, replace the cylinder block.
12. INSPECT PISTON PIN FIT
At 60°C (140°F), you should be able to push the piston pin into
the piston pin hole with your thumb.
13. INSPECT CONNECTING ROD ALIGNMENT
Using a rod aligner and feeler gauge, check the connecting rod
alignment.

Check for out-of-alignment.
Maximum out-of-alignment:
0.05 mm (0.0020 in.) per 100 mm (3.94 in.)
If bend is greater than maximum, replace the connecting rod as-
sembly.

Z04011
EM6525
EM0227
EM6347
P12406
- ENGINE MECHANICALCYLINDER BLOCK
EM-97
1081 Author
: Date
:
2001 AVALON (RM808U)

Check for twist
Maximum twist:
0.15 mm (0.0059 in.) per 100 mm (3.94 in.)
If twist is greater than maximum, replace the connecting rod as-
sembly.
14. INSPECT PISTON PIN OIL CLEARANCE
(a) Using a caliper gauge, measure the inside diameter of the
connecting rod bushing.
Bushing inside diameter:
22.005 - 22.014 mm (0.8663 - 0.8667 in.)
(b) Using a micrometer, measure the piston pin diameter.
Piston pin diameter:
21.997 - 22.006 mm (0.8660 - 0.8664 in.)
(c) Subtract the piston pin diameter measurement from the
bushing inside diameter measurement.
Standard oil clearance:
0.005 - 0.011 mm (0.0002 - 0.0004 in.)
Maximum oil clearance: 0.05 mm (0.0020 in.)
15. INSPECT CONNECTING ROD BOLTS
Using vernier calipers, measure the tension portion diameter of
the bolt.
Standard diameter: 7.2 - 7.3 mm (0.284 - 0.287 in.)
Minimum diameter: 7.0 mm (0.276 in.)
If the diameter is less than minimum, replace the bolt.
16. INSPECT CRANKSHAFT FOR CIRCLE RUNOUT
(a) Place the crankshaft on V-blocks.
(b) Using a dial indicator, measure the circle runout, as
shown in the illustration.
Maximum circle runout: 0.06 mm (0.0024 in.)
If the circle runout is greater than maximum, replace the crank-
shaft.

P12493
EM-98
- ENGINE MECHANICALCYLINDER BLOCK
1082 Author
: Date
:
2001 AVALON (RM808U)
17. INSPECT MAIN JOURNALS AND CRANK PINS
(a) Using a micrometer, measure the diameter of each main
journal and crank pin.
Main journal diameter:
60.988 - 61.000 mm (2.4011 - 2.4016 in.)
Crank pin diameter:
52.992 - 53.000 mm (2.0862 - 2.0866 in.)
If the diameter is not as specified, check the oil clearance.
(See page EM-83)
If necessary, replace the crankshaft.
(b) Check each main journal and crank pin for taper and out-
of-round as shown.
Maximum taper and out-of-round:
0.02 mm (0.0008 in.)
If the taper and out-of-round is greater than maximum, replace
the crankshaft.

EM0ZQ-02
A05260
P12417
60°C
A10527
Front Mark
(Cavity)
Front Mark
(Mold Mark) RH Piston
LH Piston
Front Mark
(Cavity)
Front Mark
(Mold Mark)
- ENGINE MECHANICALCYLINDER BLOCK
EM-101
1085 Author
: Date
:
2001 AVALON (RM808U)
REASSEMBLY
HINT:

Thoroughly clean all parts to be assembled.

Before installing the parts, apply new engine oil to all slid-
ing and rotating surfaces.

Replace all gaskets, O-rings and oil seals with new parts.
1. ASSEMBLE PISTON AND CONNECTING ROD
(a) Using a small screwdriver, install a new snap ring at one
end of the piston pin hole.
HINT:
Be sure that end gap of the snap ring is not aligned with the pin
hole cutout portion of the piston.
(b) Gradually heat the piston to about 60°C (140°F).
(c) Coat the piston pin with engine oil.
(d) Align the front marks of the piston and connecting rod,
and push in the piston pin with your thumb.
(e) Using a small screwdriver, install a new snap ring on the
other end of the piston pin hole.
HINT:
Be sure that end gap of the snap ring is not aligned with the pin
hole cutout portion of the piston.

A10524
Code Mark
Code Mark No.1
No.2
A10525
RH Piston
Lower Side Rail
No.2
CompressionFront Mark
Expander
Upper Side Rail
No.1
Compression
Lower Side Rail
Upper Side Rail LH Piston
No.2
Compression
Expander
No.1
CompressionFront Mark
P12402
Z09177
No.1 and No.4 No.2 and No.3
Upper
Lower
22.4 mm 19.0 mm EM-102
- ENGINE MECHANICALCYLINDER BLOCK
1086 Author
: Date
:
2001 AVALON (RM808U)
2. INSTALL PISTON RINGS
(a) Install the oil ring expander and 2 side rails by hand.
(b) Using a piston ring expander, install the 2 compression
rings with the code mark facing upward.
Code mark:
No.1T or G1
No.22T or G2
(c) Position the piston rings so that the ring ends are as
shown.
NOTICE:
Do not align the ring ends.
3. INSTALL CONNECTING ROD BEARINGS
(a) Align the bearing claw with the groove of the connecting
rod or connecting cap.
(b) Install the bearings in the connecting rod and connecting
rod cap.
4. INSTALL MAIN BEARINGS
HINT:

Main bearings come in widths of 19.0 mm (0.748 in.) and
22.4 mm (0.882 in.). Install the 22.4 mm (0.882 in.) bear-
ings in the No.1 and No.4 cylinder block journal positions
with the main bearing cap. Install the 19.0 mm (0.748 in.)
bearings in the No.2 and No.3 positions.

Upper bearings have an oil groove and oil holes; lower
bearings do not.

P12599
A05263
Mark
1, 2, 3 or 4
P12600
P12495
A05264
- ENGINE MECHANICALCYLINDER BLOCK
EM-103
1087 Author
: Date
:
2001 AVALON (RM808U)
(a) Align the bearing claw with the claw groove of the cylinder
block, and push in the 4 upper bearings.
NOTICE:
Install the bearing with the oil hole in the cylinder block.
(b) Align the bearing claw with the claw groove of the main
bearing cap, and push in the 4 lower bearings.
HINT:
A number is marked on each main bearing cap to indicate the
installation position.
5. INSTALL UPPER THRUST WASHERS
Install the 2 thrust washers under the No.2 journal position of
the cylinder block with the oil grooves facing outward.
6. PLACE CRANKSHAFT ON CYLINDER BLOCK
7. PLACE MAIN BEARING CAPS AND LOWER THRUST
WASHERS ON CYLINDER BLOCK
(a) Install the 2 thrust washers on the No.2 bearing cap with
the grooves facing outward.

A10530
A09696
Less than 6 mm
A10529
P12753
10 11
12 13
14
151
162
3
45
6
7
89
P25741
Painted Mark
Front90°
90° EM-104
- ENGINE MECHANICALCYLINDER BLOCK
1088 Author
: Date
:
2001 AVALON (RM808U)
(b) Temporarily place the 4 main bearing caps level and let
them in their proper locations.
(c) Apply a light coat of engine oil on the threads and under
the main bearing cap bolts for the 12 pointed head.
(d) Temporarily install the 8 main bearing cap bolts to the in-
side positions.
(e) Insert the main bearing cap with your hand until the clear-
ance between the main bearing cap and the cylinder
block will become less than 6 mm (0.23 in.) by making the
2 internal main bearing cap bolts as a guide.
(f) Using a plastic-faced hammer, lightly tap the bearing cap
to ensure a proper fit.
8. INSTALL 12 POINTED HEAD MAIN BEARING CAP
BOLTS
HINT:

The main bearing cap bolts are tightened in 2 progressive
steps (steps (b) and (d)).

If any of the main bearing cap bolts is broken or deformed,
replace it.
(a) Apply a light coat of engine oil on the threads and under
the main bearing cap bolts.
(b) Install and uniformly tighten the 16 main bearing cap bolts
in several passes and in the sequence shown.
Torque: 22 N´m (225 kgf´cm, 16 ft´lbf)
If any of the main bearing cap bolts does not meet the torque
specification, replace the main bearing cap bolt.
(c) Mark the front of the main bearing cap bolts with paint.
(d) Retighten the main bearing cap bolts by 90° in the numer-
ical order shown.
(e) Check that the painted mark is now at a 90° angle to the
front.