2005 TOYOTA AVENSIS compression ratio

A62192
Hold Pressure
DecompressAdvanced
Side Path Retard
Side Path
A62190
Advance
Side Path Retard Side
Path
Open
Close
Rubber Vinyl Tape Open Close
± ENGINE MECHANICALCAMSHAFT (1ZZ±FE/3ZZ±FE)
14±69
AVENSIS REPAIR MANUAL (RM1018E)
(4) Confirm if the camshaft timing gear assembly re-
volves in the timing advance direction when weak-
ening the air pressure of the timing retard path.
HINT:
When the lock pin is released, the camshaft timing gear re-
volves in the advance direction.
(5) When the camshaft timing gear comes to the most
advanced position, take out the air pressure of the
timing retard side path, and then take out that of tim-
ing advance side path.
CAUTION:
Camshaft timing assembly gear occasionally shifts to the
retard side abruptly, if the air compression of the advanced
side path is released first. It often causes the breakage of
the lock pin.
(c) Check smooth revolution
(1) Revolve the camshaft timing gear assembly within
the movable range [20
(40
CA)] except for the
most retarded position several times, and check the
smooth revolution.
CAUTION:
Be sure to perform this check by hand, instead of air pres-
sure.
(d) Check the lock in the most retarded position.
(1) Confirm that the camshaft timing gear assembly is
locked at the most retarded position.
16. REMOVE CAMSHAFT TIMING GEAR ASSY
(a) Clamp the camshaft in a vice, and confirm that the gear
is locked.
CAUTION:
Be careful not to damage the camshaft.
(b) Cover 4 oil paths of cam journal with vinyl tape as shown
in the illustration.
HINT:
The one of the 2 glooves on the cam journal is for retards (up-
per) and the rest is for advances (lower). Each groove has the
2 oil paths. Plug one of the oil paths for each groove with rubber
pieces before wrapping the cam journal with the tape.
(1) Punctuate the tape for the advance oil path and for
the retard oil path in the opposite side from the ad-
vance as shown in the illustration.

A62191
Advanced
Side Path Retard
Side Path
A62192
Hold Pressure
DecompressAdvanced
Side Path Retard
Side Path
A62193
Straight Pin Fringe Bolt
A62194
Straight Pin
Key Groove
14±70
± ENGINE MECHANICALCAMSHAFT (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(c) Put air pressure into two broken paths (the advance side
path and the retard side path) with about 150 kPa {1.5
kgf
cm}.
CAUTION:
Cover the paths with shop rag to avoid oil splashing.
(d) Confirm if the camshaft timing gear assembly revolves in
the timing advance direction when weakening the air
pressure of the timing retard path.
HINT:
When the lock pin is released, the camshaft timing gear re-
volves in the advance direction.
(e) When the camshaft timing gear comes to the most ad-
vanced position, take out the air pressure of the timing re-
tard side path, next, take out that of timing advance side
path.
CAUTION:
Camshaft timing gear assembly occasionally shifts to the
retard side abruptly, if the air compression of the advanced
side path is released first. It often causes the breakage of
the lock pin.
(f) Remove the fringe bolt of camshaft timing gear assembly.
NOTICE:

Be sure not to remove the other 4 bolts.

In case of reusing the camshaft timing gear, release
the straight pin lock first, and then install the gear.
17. INSTALL CAMSHAFT TIMING GEAR ASSY
(a) Put the camshaft timing gear assembly and the camshaft
together with the straight pin off the key groove.
(b) Turn the camshaft timing gear assembly clockwise (as
shown in the illustration) while pushing it lightly against
the camshaft. Push further at the position where the pin
gets into the groove.
CAUTION:
Be sure not to turn the camshaft timing gear to the retard
angle side (to the right angle).

A64856
A62185
MarkMark
Mark Timing Chain
Cover Surface
Timing
Notch
A62837SST
A11858
±
ENGINE MECHANICAL CHAIN SUB±ASSY(1ZZ±FE/3ZZ±FE)
14±51
AVENSIS REPAIR MANUAL (RM1018E)
15.REMOVE CYLINDER HEAD COVER SUB±ASSY
(a)Remove the 9 bolts, 2 seal washers, 2 nuts and 3 clamp
brackets and detach the cylinder head cover.
16.SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a)Turn the crankshaft pulley to align the timing notch with timing mark º0º of the timing chain cover.
(b)Check that the point marks of the camshaft timing sprock- et and VVT timing sprocket are in straight line on the tim-
ing chain cover surface as shown in the illustration.
HINT:
If not, turn the crankshaft 1 revolution (360
) and align the
marks as above.
17.REMOVE CRANKSHAFT PULLEY
(a)Using SST, remove the pulley bolt. SST09960±10010 (09962±01000, 09963±01000)
(b)Remove the crankshaft pulley from the crankshaft.
18.REMOVE V±RIBBED BELT TENSIONER ASSY
(a)Remove the bolt and nut and detach V±ribbed belt ten- sioner.
HINT:
Jack up and down to remove the bolt.
19.REMOVE WATER PUMP ASSY(See page 16±9)

A30857
A10079
A62170
Set KeyUpward
A62171
Yellow
Color Link
Timing Mark
A62172
SST
± ENGINE MECHANICALCHAIN SUB±ASSY (1ZZ±FE/3ZZ±FE)
14±53
AVENSIS REPAIR MANUAL (RM1018E)
27. REMOVE CHAIN SUB±ASSY
(a) Remove the timing chain with the crankshaft timing gear
by plying it using screwdrivers as shown in the illustration.
NOTICE:

Put shop rag to protect the engine.

In case of revolving the camshafts with the chain off
the sprockets, turn the crankshaft 1/4 revolution
counterclockwise for valves not to touch the pistons.
28. INSTALL CHAIN SUB±ASSY
(a) Set No. 1 cylinder to TDC/compression.
(1) Turn the camshafts with a wrench and align the
point marks of the camshaft timing sprockets.
(2) Using a crankshaft pulley bolt, turn the crankshaft
and set the set key on the crankshaft upward.
(b) Install the timing chain to the crankshaft timing sprocket
with the yellow color link aligned with the timing mark on
the crankshaft timing sprocket.
HINT:
Three yellow color links are on the chain.
(c) Using SST, install the crankshaft timing sprocket.
SST 09223±22010

141B6±01
A77281
A77378
No. 1 Cylinder TDC/Compression
IN
EX
A77379
No. 4 Cylinder TDC/Compression
IN
EX
14±106
±
ENGINE MECHANICAL VALVE CLEARANCE(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
VALVE CLEARANCE(1AZ±FE)
ADJUSTMENT
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 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 (See page 14±171)
7.SET NO. 1 CYLINDER TO TDC/COMPRESSION (See page 14±171) 8. INSPECT VALVE CLEARANCE
HINT:
Inspect and adjust the valve clearance when the engine is cold.
(a) Check only the valve indicated in the illustration.(1) Using a feeler gauge, measure the clearance be-tween the valve lifter and camshaft.
(2) Record the out±of specification valve clearance measurements. They will be used later to determine
the required replacement adjusting shim.
Valve clearance (Cold):
Intake 0.19 to 0.29 mm (0.0075 to 0.0114 in.)
Exhaust 0.30 to 0.40 mm (0.0118 to 0.0157 in.)
(b) Turn the crankshaft clockwise 1 revolution (360
) and set
No. 4 cylinder to TDC/compression.
(c) Check only the valve indicated in the illustration. (1) Using a feeler gauge, measure the clearance be-tween the valve lifter and camshaft.
(2) Record the out±of specification valve clearance measurements. They will be used later to determine
the required replacement adjusting shim.
Valve clearance (Cold):
Intake 0.19 to 0.29 mm (0.0075 to 0.0114 in.)
Exhaust 0.30 to 0.40 mm (0.0118 to 0.0157 in.)

A01082
EXAMPLE: (Intake)
Measure valve clearance = 0.44 mm (0.0173 in.)
0.44 mm (0.0173 in.) ± 0.24 mm (0.0094 in.) = 0.20 mm (0.0079 in\
.)
(Measured ± Specification = Excess clearance)
Used shim measurement = 5.30 mm (0.2087 in.)
0.20 mm (0.0079 in.) + 5.30 mm (0.2087 in.) = 5.50 mm (0.2165 in.)\

(Excess clearance + Used shim = Ideal new shim)
Closest new shim = 5.50 mm (0.2165 in.) = Shim No. º50º
A77295
±
ENGINE MECHANICAL VALVE CLEARANCE(1AZ±FE)
14±107
AVENSIS REPAIR MANUAL (RM1018E)
9.ADJUST VALVE CLEARANCE
NOTICE:
Be sure not to turn the crankshaft without the chain ten-
sioner.
(a)Set the No. 1 cylinder to TDC/compression.
(See page 14±171)
(b)Remove the chain tensioner. (See page 14±171)
(c)Remove the camshafts. (See page 14±171)
(d) Tie the timing chain with a string.
NOTICE:
Be careful not to drop anything inside the timing chain cov-
er.
(e) Remove the valve lifters.
(f) Using a micrometer, measure the thickness of the re-
moved lifter.
(g) Calculate the thickness of a new lifter so that the valve
clearance comes within the specified valve.
AThickness of new lifter
BThickness of used lifter
CMeasured valve clearance
Valve clearance:
Intake: A = B + (C ± 0.24 mm (0.0094 in.))
Exhaust: A = B + (C ± 0.35 mm (0.0138 in.))
HINT:

Select a new lifter with a thickness as close as possible
to the calculated valves.

Lifter are available in 35 sizes in increments of 0.020 mm
(0.0008 in.), from 5.060 mm (0.1992 in.) to 5.740 mm
(0.2260 in.).

Identification number inside the valve lifter shows the val-
ue of the 2 decimal places. (The illustration shows 5.380
mm (0.2118 in.))

Refer to the New Lifter Thickness table on the next 2
pages.

±
ENGINE MECHANICAL ENGINE(1AZ±FE)
14±103
AVENSIS REPAIR MANUAL (RM1018E)
(3)While cranking the engine, measure the compres-
sion pressure.
Compression pressure:
1,300 kPa (13.3 kgf/cm
2, 189 psi)
Minimum pressure:
1000 kPa (10.2 kgf/cm
2, 145 psi)
Difference between each cylinder:
100 kPa (1.0 kgf/cm
2, 14 psi)
NOTICE:

Always use a fully charged battery to obtain engine
speed of 250 rpm or more.

Check other cylinder's compression pressure in the
same way.

This measurement must be done in as short a time as
possible.
(4)If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the
spark plug hole and inspect again.
HINT:

If adding oil increases the compression, the piston rings
and/or cylinder bore may be worn or damaged.

If pressure stays low, a valve may be sticking or seating
improperly, or there may be leakage past the gasket.
10.INSPECT CO/HC
(a)Start the engine.
(b)Run the engine at 2,500 rpm for approximately 180 seconds.
(c)Insert CO/HC meter testing probe at least 40 cm (1.3 ft) into the tail\
pipe during idling.
(d)Check CO/HC concentration at idle. Idle CO concentration: 0 to 0.5 %
Idle HC concentration: Applicable local regulation
(e)If the CO/HC concentration does not conform to specifications, perform troubleshooting in the order given below.
(1)Check heated oxygen sensor operation. (See page 12±6)
(2) See the table below for possible causes, and then inspect and repair the applicable causes ifnecessary.

A64856
A62185
MarkMark
Mark Timing Chain
Cover Surface
Timing
Notch
A62837SST
A11858
±
ENGINE MECHANICAL CYLINDER HEAD GASKET(1ZZ±FE/3ZZ±FE)
14±85
AVENSIS REPAIR MANUAL (RM1018E)
33.REMOVE CYLINDER HEAD COVER SUB±ASSY
(a)Remove the 9 bolts, 2 seal washers, 2 nuts and 3 clamp
brackets.
(b)Remove the cylinder head cover.
34.SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a)Turn the crankshaft pulley to align the timing notch with the timing mark º0º of the timing chain cover.
(b)Check that the point marks of the camshaft timing sprock- et and VVT timing sprocket are in straight line on the tim-
ing chain cover surface as shown in the illustration.
HINT:
If not, turn the crankshaft 1 revolution (360
) and align the
marks as above.
35.REMOVE CRANKSHAFT PULLEY
(a)Using SST, remove the pulley bolt. SST09960±10010 (09962±01000, 09963±01000)
(b)Remove the crankshaft pulley from the crankshaft.
36.REMOVE V±RIBBED BELT TENSIONER ASSY
(a)Remove the bolt and nut and detach the V±ribbed belt tensioner.
HINT:
Jack up and down to remove the bolt.
37.REMOVE WATER PUMP ASSY(See page 16±9)