TOYOTA AVENSIS 2005 Service Repair Manual

14±184
± ENGINE MECHANICALENGINE (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)CO
HCProblemsCauses
NormalHighRough idle
1. Faulty ignitions:

Incorrect timing

Fouled, shorted or improperly gapped plugs
2. Incorrect valve clearance
3. Leaks in intake and exhaust valves
4. Leaks in cylinders
LowHighRough idle
(Fluctuating HC reading)
1. Vacuum leaks:

PCV hoses

Intake manifold

Throttle body

ISC valve

Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)
1. Restricted air filter
2. Plugged PCV valve
3. Faulty EFI systems:

Faulty pressure regulator

Defective water temperature sensor

Defective mass air flow meter

Faulty ECM

Faulty injectors

Faulty throttle position sensor

141BI±01
A77421
Cut Position
A77422SST
14±180
±
ENGINE MECHANICAL ENGINE REAR OIL SEAL(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
ENGINE REAR OIL SEAL(1AZ±FE)
REPLACEMENT
1.REMOVE MANUAL TRANSAXLE ASSY (M/T TRANSAXLE) (See page 41±24)
2.REMOVE AUTOMATIC TRANSAXLE ASSY (A/T TRANSAXLE) (See page 40±25)
3.REMOVE CLUTCH COVER ASSY (M/T TRANSAXLE) (See page 42±26)
4.REMOVE DRIVE PLATE AND RING GEAR OR FLYWHEEL (See page 14±121) SST09213±54015 (91651±60855), 09330±00021
5.REMOVE ENGINE REAR OIL SEAL
(a)Using a knife, cut off the engine rear oil seal lip.
(b)Using a screwdriver with the tip wrapped in tape, pry outthe engine rear oil seal.
HINT:
After the removal, check if the crankshaft is not damaged.
If is damaged, smooth the surface with 400±grit sandpaper.
6.INSTALL ENGINE REAR OIL SEAL
(a)Apply MP grease to a new engine rear oil seal lip.
NOTICE:
Keep the lip off foreign materials.
(b)Using SST and a hammer, tap in the engine rear oil seal until its surface is flush with the engine rear oil seal retain-
er edge.
SST09223±15030, 09950±70010 (09951±07100)
NOTICE:
Wipe off extra grease on the crankshaft.
7.INSTALL DRIVE PLATE AND RING GEAR OR FLYWHEEL (See page 14±121) SST09213±54015 (91651±60855), 09330±00021
8.INSTALL CLUTCH COVER ASSY (M/T TRANSAXLE) (See page 42±26)
9.INSTALL MANUAL TRANSAXLE ASSY (M/T TRANSAXLE) (See page 41±24)
10.INSTALL AUTOMATIC TRANSAXLE ASSY (A/T TRANSAXLE) (See page 40±25)

141BH±01
A77281
A13697
SST
SST
A77381
SST
14±178
±
ENGINE MECHANICAL TIMING GEAR CASE OR TIMING CHAIN CASE OIL
SEAL(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
TIMING GEAR CASE OR TIMING CHAIN CASE OIL
SEAL(1AZ±FE)
REPLACEMENT
1.REMOVE FRONT WHEEL RH
2.REMOVE RADIATOR SUPPORT OPENING COVER
3.REMOVE ENGINE ROOM COVER SIDE
4.REMOVE ENGINE UNDER COVER RH 5.REMOVE ENGINE COVER SUB±ASSY NO.1
(a)Remove the 2 nuts and the engine cover No. 1.
6.REMOVE FAN AND GENERATOR V BELT (See page 14±105) SST 09249±63010
7. REMOVE CRANKSHAFT PULLEY
(a) Using SST, loosen the pulley bolt.SST 09213±54015 (91651±60855), 09330±00021,
(b) Using SST, remove the crankshaft pulley. SST 09950±50013 (09951±05010, 09952±05010, 09953±05020, 09954±05021)

A77418
Cut Position
A77419
SST
A77420
SST
SST
±
ENGINE MECHANICAL TIMING GEAR CASE OR TIMING CHAIN CASE OIL
SEAL(1AZ±FE)14±179
AVENSIS REPAIR MANUAL (RM1018E)
8.REMOVE TIMING GEAR CASE OR TIMING CHAIN
CASE OIL SEAL
(a)Using a screwdriver with tip wrapped in the tape, pry out
the oil seal.
HINT:
After removal, check if the crankshaft is not damaged.
If it is damaged, smooth the surface with 400±grit sandpaper.
9.INSTALL TIMING GEAR CASE OR TIMING CHAIN CASE OIL SEAL
(a)Apply MP grease to a new oil seal lip.
NOTICE:
Keep the lip off foreign materials.
(b)Using SST and a hammer, tap in the oil seal until its sur- face is flush with the rear oil seal retainer edge.
SST09223±22010
NOTICE:
Wipe off extra grease on the crankshaft.
10.INSTALL CRANKSHAFT PULLEY
(a)Align the pulley set key with the key groove of the pulley.
(b)Using SST, install the pulley bolt. SST09213±54015 (91651±60855), 09330±00021
Torque: 170 N
m (1,733 kgf
cm, 125 ft
lbf)
11.INSTALL FAN AND GENERATOR V BELT (See page 14±105) SST 09249±63010
12. INSTALL ENGINE COVER SUB±ASSY NO.1 Torque: 7.0 N
m (71 kgf
cm, 62 in.
lbf)
13. INSTALL FRONT WHEEL RH Torque: 103 N
m (1,050 kgf
cm, 76 ft
lbf)
14. CHECK FOR ENGINE OIL LEAKS

141BK±01
A77281
A77283
A77284
± ENGINE MECHANICALCAMSHAFT (1AZ±FE)
14±171
AVENSIS REPAIR MANUAL (RM1018E)
REPLACEMENT
1. REMOVE RADIATOR SUPPORT OPENING COVER
2. REMOVE ENGINE ROOM COVER SIDE
3. REMOVE ENGINE UNDER COVER RH
4. REMOVE ENGINE COVER SUB±ASSY NO.1
(a) Remove the 2 nuts and the engine cover No. 1.
5. REMOVE IGNITION COIL ASSY
(a) Remove 4 bolts and the ignition coils.
6. REMOVE CYLINDER HEAD COVER SUB±ASSY
(a) Disconnect the 2 PCV hoses from the cylinder head cov-
er.
(b) Remove the 8 bolts and 2 nuts, and then remove the cylin-
der head cover and gasket.
7. SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley, and align its timing notch with
timing mark 0 of the timing chain cover.

A77285
Unleaded Gasoline
Leaded GasolineTiming
Marks
Timing
Marks Timing
Marks
Timing
Marks
A77286
Push
A77412
HoldLoosen
A77294
15973
481062 14±172
± ENGINE MECHANICALCAMSHAFT (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(b) Check that each timing mark of the camshaft timing gears
is aligned with each timing mark located on the No. 1 and
No. 2 bearing caps as shown in the illustration.
If not, turn the crankshaft 1 revolution (360
) and align the
marks as above.
8. REMOVE CHAIN TENSIONER ASSY NO.1
(a) Remove the 2 nuts, then remove the chain tensioner and
a gasket.
NOTICE:
Do not turn the crankshaft.
9. REMOVE NO.2 CAMSHAFT
(a) Hold the No. 2 camshaft with a wrench on the hexagonal
lobe, and loosen the camshaft timing gear set bolt.
NOTICE:
Be careful not to damage the cylinder head and valve lifter
with the wrench.
(b) Using several steps, loosen and remove the 10 camshaft
bearing cap bolts uniformly in the sequence shown in the
illustration.
(c) Remove the 5 camshaft bearing caps.

A52473
A77309
15973
481062
A56228
A77413
Advance
Side Port
± ENGINE MECHANICALCAMSHAFT (1AZ±FE)
14±173
AVENSIS REPAIR MANUAL (RM1018E)
(d) Raising the No. 2 camshaft, remove the set bolt.
(e) Remove the camshaft timing gear from the No. 2 cam-
shaft with the timing chain wrapped.
(f) Remove the camshaft timing gear from the timing chain.
10. REMOVE CAMSHAFT
(a) Using several steps, loosen and remove the 10 camshaft
bearing cap bolts uniformly in the sequence shown in the
illustration.
(b) Remove the 5 camshaft bearings.
(c) Remove the camshaft.
(d) Tie the timing chain as shown in the illustration.
NOTICE:

Be careful not to drop anything inside the timing
chain cover.

Do not expose the chain to water, and prevents dust.
11. REMOVE CAMSHAFT TIMING GEAR OR SPROCKET (LEADED GASOLINE)
(a) Clamp the camshaft in a vise and remove the bolt and the camshaft timing gear.
12. REMOVE CAMSHAFT TIMING GEAR ASSY
(UNLEADED GASOLINE)
(a) Fix the camshaft with a vise, and make sure the camshaft
timing gear does not rotate.
(b) Cover all the oil ports with vinyl tape except an advance
side port shown in the illustration.

A31032
A32639
A77414
Straight
Pin
Key
Groove 14±174
± ENGINE MECHANICALCAMSHAFT (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(c) Put air pressure into the oil port with 150 kpa (1.5 kgf/cm2
21 psi), and turn the camshaft timing gear to the advance
direction (counterclockwise) by hand.
CAUTION:
Cover the paths with shop rag to avoid oil splashing.
HINT:
Depending on the air pressure, the camshaft timing gear will
turn to the advance angle side without applying force by hand.
Also, under the condition that the pressure can be hardly ap-
plied because of the air leakage from the port, there may be the
case that the lock pin could be hardly released.
(d) Remove the fringe bolt of camshaft timing gear.
NOTICE:

Be sure not to remove the other 4 bolts.

If reusing the camshaft timing gear, release the
straight pin lock first, and then install the gear.
13. INSTALL CAMSHAFT TIMING GEAR OR SPROCKET (LEADED GASOLINE)
Torque: 54 N
m (551 kgf
cm, 40 ft
lbf)
14. INSTALL CAMSHAFT TIMING GEAR ASSY
(UNLEADED GASOLINE)
(a) Put the camshaft timing gear and the camshaft together
with the straight pin off the key groove.
(b) Turn the camshaft timing gear assembly to the left direc-
tion (as shown in the illustration) while lightly pushing it to-
ward the camshaft. Push further at the position where the
pin gets into the groove.
NOTICE:
Be sure not to turn the camshaft timing gear to the retard
angle side (to the right direction).
(c) Check that there is no clearance between the gear's
fringe and the camshaft.
(d) Tighten the fringe bolt with the camshaft timing gear fixed.
Torque: 54 N
m (551 kgf
cm, 40 ft
lbf)
(e) Check that the camshaft timing gear can move to the re-
tard angle side (to the right direction), and is locked at the
most retarded position.

A77284
A77415Bearing Cap No. 1Bearing Cap No. 3 5
312 4
A52473
A77416
Bearing Cap No. 2 Bearing Cap No. 3
531 2 4
A77417
TightenHold
± ENGINE MECHANICALCAMSHAFT (1AZ±FE)
14±175
AVENSIS REPAIR MANUAL (RM1018E)
15. INSTALL CAMSHAFT
(a) Turn the crankshaft pulley, and align its groove with timing
mark 0 of the timing chain cover.
(b) Install the timing chain on the camshaft timing gear, with
the painted links aligned with the timing marks on the
camshaft timing gear.
(c) Examine the front marks and numbers and tighten the
bolts in the sequence shown in the illustration.
Torque:
Bearing cap No. 1 30 N
m (301 kgf
cm, 22 ft
lbf)
Bearing cap No. 3 9.0 N
m (92 kgf
cm, 80 in.
lbf)
16. INSTALL NO.2 CAMSHAFT
(a) Put the No. 2 camshaft on the cylinder head with the
painted links of the chain aligned with the timing mark on
the camshaft timing gear.
(b) Raising the No. 2 camshaft, tighten the set bolt temporari-
ly.
(c) Examine the from marks and numbers and tighten the
bolts in the sequence shown in the illustration.
Torque:
Bearing cap No. 2 30 N
m (301 kgf
cm, 22 ft
lbf)
Bearing cap No. 3 9.0 N
m (92 kgf
cm, 80 in.
lbf)
(d) Hold the camshaft with a wrench on the hexagonal lobe,
and tighten the camshaft timing gear set bolt.
Torque: 54 N
m (551 kgf
cm, 40 ft
lbf)
NOTICE:
Be careful not to damage the cylinder head and valve lifter.

A77285
Unleaded Gasoline
Leaded GasolineTiming
Marks
Timing
Marks Timing
Marks
Timing
Marks
A77394
Raise
PinHook Push
A77395
Engine
Front 14±176
± ENGINE MECHANICALCAMSHAFT (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(e) Check that the match marks on the timing chain and the
camshaft timing gears are positioned as shown in the il-
lustration.
17. INSTALL CHAIN TENSIONER ASSY NO.1
(a) Release the ratchet pawl, fully push in the plunger and ap-
ply the hook to the pin so that the plunger is locked in posi-
tion.
(b) Install a new gasket and the chain tensioner No. 1 with the
2 nuts.
Torque: 9.0 N
m (92 kgf
cm, 80 in.
lbf)
NOTICE:
If the hook is disengaged while installing, apply the hook
again, and then resume the installation.