Page 2377 of 5135

160N7±01
B08008
CO0929
B08007
8.5mm
± COOLINGCOOLING SYSTEM (1CD±FTV)
16±39
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION
1. INSPECT THERMOSTAT
HINT:
The thermostat is numbered with the valve opening tempera-
ture.
(a) Immerse the thermostat in water and gradually heat the
water.
(b) Check the valve opening temperature of the thermostat.
Valve opening temperature:
80 to 84C (176 to 183F)
If the valve opening temperature is not as specified, replace the
thermostat.
(c) Check the valve lift.
Valve lift: 8.5 mm (0.33 in.) or more at 95C (203F)
If the valve lift is not as specified, replace the thermostat.
(d) Check that the valve is fully closed when the thermostat
is at low temperatures (below 77C (171F)).
If not closed, replace the thermostat.
2. INSPECT RESERVE TANK CAP SUB±ASSY
NOTICE:
If the radiator cap is contaminatied, rinse it with water.
Before using a radiator cap tester, wet the relief valve
and the pressure valve with engine coolant or water.
When performing following steps (a) and (b), keep the
tester at an angle of over 30 above horizontal.
Page 2378 of 5135

B08802
Radiator Cap Tester
30 or
more Reserve tank Cap
A55603Drain Hole
Turn
16±40
± COOLINGCOOLING SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
(a) Using a radiator cap tester, slowly pump the tester and
check that air is coming from the vacuum valve.
Pump speed: 1 push / 3 seconds or more
NOTICE:
Push the pump at a constant speed.
If air is not coming from the vacuum valve, replace the reserve
tank cap.
(b) Pump the tester and measure the relief valve opening
pressure.
NOTICE:
The following pump speed is for the first pump only (in or-
der to close the vacuum valve). After the first pump, the
pump speed can be reduced.
Pump speed: 1 push within 1 second
Standard opening pressure:
93 to 122 kPa (0.95 to 1.25 kgf/cm
2, 13.4 to 17.6 psi)
Minimum opening pressure:
78 kPa (0.8 kgf/cm
2, 11.4 psi)
If the opening pressure is less than minimum, replace the re-
serve tank cap.
HINT:
Use the tester's maximum reading as the opening pressure.
3. INSPECT WATER PUMP ASSY
(a) Visually check the drain hole for coolant leakage.
If leakage is found, replace the water pump.
(b) Turn the pulley, and check that the water pump bearing
moves smoothly and does not make noise.
If necessary, replace the water pump.
Page 2379 of 5135

160N6±01
A78434
Radiator Cap Tester
± COOLINGCOOLING SYSTEM (1CD±FTV)
16±37
AVENSIS REPAIR MANUAL (RM1018E)
COOLING SYSTEM (1CD±FTV)
ON±VEHICLE INSPECTION
1. INSPECT COOLING SYSTEM FOR LEAKS
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot. Ther-
mal expansion will cause hot engine coolant and steam to
blow out from the radiator.
(a) Remove the radiator support opening cover.
(b) Remove the engine room cover side.
(c) Fill the radiator with coolant and attach a radiator cap tes-
ter.
(d) Warm up the engine.
(e) Pump it to 137 kPa (1.4 kgf/cm
2, 19.9 psi), and check that
the pressure does not drop.
If the pressure drops, check the hoses, radiator and water
pump for leaks. If there are no signs or traces of external coolant
leaks, check the heater core, cylinder block and head.
(f) Reinstall the engine room cover side.
(g) Reinstall the radiator support opening cover.
2. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
(a) The engine coolant should be between the ºLOWº and ºFULLº lines, when the engine is cold.
If low, check for leaks and add ºToyota Long Life Coolantº or equivalent up to the ºFULLº line.
3. CHECK ENGINE COOLANT QUALITY
(a) Remove the radiator cap.
CAUTION:
To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator
are still hot. Thermal expansion will cause hot engine coolant and steam to blow out from the radiator.
(b) Check if there is any excessive deposits of rust or scale around the radiator cap and radiator filler hole;
the coolant should be free from oil.
If excessively dirty, replace the coolant.
(c) Reinstall the radiator cap.
Page 2380 of 5135
A73603
16±38
± COOLINGCOOLING SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
4. INSPECT FINS BLOCKAGE
(a) If fins are clogged, wash them with water or a steam
cleaner and dry with compressed air.
NOTICE:
If the distance between the steam cleaner and the
core is too close, there is a possibility of damaging
the fins, so keep the following injection distance.
Injection Pressures
kPa (kgf/cm2, psi)
Injection Distance
mm (in.)
2,942 to 4,903
(30 to 50, 427 to 711)300 (11.811)
4,903 to 7,845
(50 to 80, 711 to 1,138)500 (19.685)
If the fins are bent, straighten them with a screwdriver
or pliers.
Be careful not pour water directly onto electronic
components.
Page 2381 of 5135
160MS±01
16±36
±
COOLING RADIATOR ASSY(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
RADIATOR ASSY(1AZ±FSE)
REPLACEMENT
1.DRAIN COOLANT (See page 16±31)
2.REMOVE RADIATOR SUPPORT OPENING COVER
3.REMOVE ENGINE ROOM COVER SIDE
4.REMOVE ENGINE UNDER COVER RH
5.DISCONNECT RADIATOR HOSE INLET
6.DISCONNECT RADIATOR HOSE OUTLET
7.REMOVE RADIATOR SUPPORT UPPER
(a)Disconnect the fan w/ motor wire harness, connector and the horn connect\
or.
(b)Remove 4 bolts, the nut and the radiator support.
8.REMOVE RADIATOR ASSY
(a)Remove 2 upper support, and radiator assembly
9.REMOVE RADIATOR SUPPORT LOWER
10.REMOVE FAN ASSY W/MOTOR
(a)Remove 6 bolts and fan w/motor.
11.INSTALL FAN ASSY W/MOTOR
12.INSTALL RADIATOR SUPPORT LOWER
13.INSTALL RADIATOR ASSY
14.INSTALL RADIATOR SUPPORT UPPER
(a)Install radiator support with 2 bolts. Torque: 19 N m (194 kgf cm,14 ft lbf)
15.ADD COOLANT (See page 16±31)
16.INSPECT CHECK FOR ENGINE COOLANT LEAKS (See page 16±25)
Page 2382 of 5135

160MQ±01
A56451
A77424
1010
±
COOLING THERMOSTAT(1AZ±FSE)
16±35
AVENSIS REPAIR MANUAL (RM1018E)
THERMOSTAT(1AZ±FSE)
REPLACEMENT
1.DRAIN COOLANT (See page 16±31)
2.REMOVE RADIATOR SUPPORT OPENING COVER
3.REMOVE ENGINE ROOM COVER SIDE
4.REMOVE ENGINE UNDER COVER RH
5.REMOVE FAN AND GENERATOR V BELT (See page 14±185)
SST09249±63010
6.REMOVE GENERATOR ASSY (See page 19±20)
7.REMOVE WATER INLET
(a)Remove 2 nuts, and disconnect the water inlet from thecylinder block.
8.REMOVE THERMOSTAT 9.INSTALL THERMOSTAT
(a)Install a new gasket to the thermostat.
(b)Install the thermostat with the jiggle valve upward.
HINT:
The jiggle valve may be set within 10 on either side of the pre-
scribed position.
10.INSTALL WATER INLET
(a)Install the water inlet with 2 nuts. Torque: 9.0 N m (92 kgf cm,7 in. lbf)
11.INSTALL GENERATOR ASSY (See page 19±20)
12.INSTALL FAN AND GENERATOR V BELT (See page 14±185) SST 09249±63010
13.ADD COOLANT (See page 16±31)
14.INSPECT CHECK FOR ENGINE COOLANT LEAKS(See page 16±25)
Page 2383 of 5135
160MR±01
B12054
SST
B12052
B12053
Pry
PryPry
±
COOLING WATER PUMP ASSY(1AZ±FSE)
16±33
AVENSIS REPAIR MANUAL (RM1018E)
WATER PUMP ASSY(1AZ±FSE)
REPLACEMENT
1.DRAIN COOLANT (See page 16±31)
2. REMOVE RADIATOR SUPPORT OPENING COVER
3. REMOVE ENGINE ROOM COVER SIDE
4. REMOVE ENGINE UNDER COVER RH
5.REMOVE FAN AND GENERATOR V BELT (See page 14±185)
SST 09249±63010
6.REMOVE GENERATOR ASSY (See page 19±20)
7. REMOVE WATER PUMP PULLEY
(a) Using SST, remove 4 bolts and pump pulley.SST 09960±10010 (09962±01000, 09963±00700)
(b) Disconnect the crankshaft position sensor wire clamp from the water pump.
(c) Disconnect the crankshaft position sensor wire from the clamp on the water pump.
8. REMOVE WATER PUMP ASSY
(a) Remove 4 bolts, 2 nuts, wire clamp and water pump.
(b) Using a screwdriver, pry between the water pump and cyl- inder block, and remove the water pump.
NOTICE:
Be careful not to damage the contact surface of the water
pump and cylinder block.
Page 2384 of 5135

A57664
Seal Width
2.2 to 2.5 mm0.5 to 1.0 mm
B12052
B12054
SST
16±34
±
COOLING WATER PUMP ASSY(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
9.INSTALL WATER PUMP ASSY
(a)Remove any old packing (FIPG) material from the contact surface.
(b)Apply seal packing to the water pump as shown in the il- lustration.
Seal packing: Part No. 08826 ± 00100 or equivalent
Install a nozzle that has been cut to a 2.2 to 2.5 mm
(0.09 to 0.10 in.) opening.
Parts must be assembled within 5 minutes of ap-
plication. Otherwise the material must be removed
and reapplied.
Immediately remove nozzle from the tube and rein-
stall cap.
(c)Install the water pump and wire clamp with 4 bolts and 2 nuts.
Torque: 9.0 N m (90 kgf cm, 80 in. lbf)
(d)Install the crankshaft position sensor wire harness clamp to the water pump.
(e)Install the crankshaft position sensor wire to the wire clamp on the water pump.
10.INSTALL WATER PUMP PULLEY
(a)Using SST, install the pump pulley with 4 bolts. SST09960±10010 (09962±01000, 09963±00700)
Torque: 26 N m (265 kgf cm, 19 ft lbf)
11.INSTALL GENERATOR ASSY (See page 19±20)
12.INSTALL FAN AND GENERATOR V BELT (See page 14±185) SST 09249±63010
13.ADD COOLANT (See page 16±31)
14.INSPECT CHECK FOR ENGINE COOLANT LEAKS(See page 16±25)