coolant TOYOTA AVALON 2001 Service User Guide

CO02K-03
- COOLINGCOOLANT
CO-1
1194 Author
: Date
:
2001 AVALON (RM808U)
COOLANT
INSPECTION
1. CHECK ENGINE COOLANT LEVEL AT RADIATOR RESERVOIR
The engine coolant level should be between the ºLOWº and ºFULLº lines, when the engine is cold.
If low, check for leaks and add ''Toyota Long Life Coolantº or Equivalent up to the ºFULLº line.
2. CHECK ENGINE COOLANT QUALITY
(a) Remove the radiator cap from the water outlet.
CAUTION:
To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator
are still hot, as fluid and steam can be blown out under pressure.
(b) There should not be any excessive deposits of rust or scale around the radiator cap or water outlet
filler hole, and the coolant should be free from oil.
If excessively dirty, clean the coolant passages and replace the coolant.
(c) Reinstall the radiator cap.

CO02L-03
B09030Drain PlugDrain Plug
CO-2
- COOLINGCOOLANT
1195 Author
: Date
:
2001 AVALON (RM808U)
REPLACEMENT
1. DRAIN ENGINE COOLANT
(a) Remove the radiator cap from the water outlet.
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot, as fluid
and steam can be blown out under pressure.
(b) Loosen the radiator drain plug and engine drain plugs,
and drain the coolant.
(c) Close the drain plugs.
Torque:
RH engine drain plug on cylinder block side cover:
7 N´m (70 kgf´cm, 61 in.´lbf)
LH engine drain plug on union:
13 N´m (130 kgf´cm, 9 ft´lbf)
2. FILL ENGINE COOLANT
(a) Slowly fill the system with coolant.

Use of improper coolants may damage engine cool-
ing system.

Use ºToyota Long life Coolantº or equivalent and
mix it with plan water according to the manufactur-
er's directions.

Using of coolant which includes more than 50 %
(freezing protection down to -35°C (-31°F) or 60 %
(freezing protection down to -50°C (-58°F)) of eth-
ylene-glycol is recommended but not more than 70
%.
NOTICE:

Do not use an alcohol type coolant or plain water
alone.

The coolant should be mixed with plain water (prefer-
ably demineralized water or distilled water).
Capacity: 9.0 liters (9.5 US qts, 7.9 lmp. qts)
(b) Install the radiator cap.
(c) Start the engine, and bleed the cooling system.
(d) If necessary, refill coolant into the reservoir up to the
ºFULLº line.
3. CHECK ENGINE COOLANT FOR LEAKS
4. CHECK ENGINE COOLANT SPECIFIC GRAVITY COR-
RECTLY

CO09O-02
B09051
No.1
B09052
No.2
- COOLINGELECTRIC COOLING FAN
CO-27
1220 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
REMOVE COOLING FANS
(a) Remove the No.1 cooling fan.
(1) Remove the batter and battery tray.
(2) Disconnect the cruise control actuator.
(3) Disconnect the No.3 engine room relay block from
radiator.
(4) Disconnect the cooling fan connector.
(5) Disconnect the wire clamps from the fan shroud.
(6) Remove the 2 bolts and cooling fan.
Torque: 5.0 N´m (50 kgf´cm, 44 in.´lbf)
(b) Remove the No.2 cooling fan.
(1) Drain the engine coolant.
(2) Disconnect the upper radiator hose from the radia-
tor.
(3) Disconnect the cooling fan and No.1 ECT switch
wire connectors.
(4) Disconnect the wire clamps from the fan shroud.
(5) Disconnect the No.1 ECT switch connector.
(6) Remove the 2 bolts and cooling fan.
Torque: 5.0 N´m (50 kgf´cm, 44 in.´lbf)

CO037-03
S04602No.1 ECT Switch
P01924
Ohmmeter
B04397
No.2 ECT
Switch
P06722
Ohmmeter
- COOLINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
CO-29
1222 Author
: Date
:
2001 AVALON (RM808U)
ENGINE COOLANT
TEMPERATURE (ECT) SWITCH
INSPECTION
1. DRAIN ENGINE COOLANT
2. INSPECT NO.1 ECT SWITCH
(a) Remove the No.1 ECT switch.
(b) Inspect the No.1 ECT switch.
(1) Using an ohmmeter, check that there is continuity
between the terminals when the coolant tempera-
ture is above 98°C (208°F).
If there is no continuity, replace the switch.
(2) Check that there is no continuity, between the termi-
nals when the coolant temperature is below 88°C
(190°F).
If there is continuity, replace the switch.
(c) Reinstall the No.1 ECT switch.
3. INSPECT NO.2 ECT SWITCH
(a) Remove the No.2 ECT switch.
(b) Inspect the No.2 ECT switch.
(1) Using an ohmmeter, check that there is continuity
between terminals when the coolant temperature is
above 93°C (199°F).
If there is no continuity, replace the switch.
(2) Check that there is no continuity between the termi-
nals when the coolant temperature is below 83°C
(181°F).
If there is continuity, replace the switch.
(c) Reinstall the No.2 ECT switch.

CO-30
- COOLINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
1223 Author
: Date
:
2001 AVALON (RM808U)
4. REFILL ENGINE COOLANT
5. START ENGINE AND CHECK FOR COOLANT LEAKS

CO09I-02
Z00570
Radiator Cap Tester
30° or More
Radiator Cap
P13014
Radiator Cap
Tester CO-14
- COOLINGRADIATOR
1207 Author
: Date
:
2001 AVALON (RM808U)
ON-VEHICLE INSPECTION
1. REMOVE RADIATOR CAP
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot, as fluid
and steam can be blow out under pressure.
2. INSPECT RADIATOR CAP
NOTICE:

If the radiator cap has contaminations, always rinse
it with water.

When performing steps (a) and (b) below, keep the ra-
diator cap tester at an angle of over 30° above the hor-
izontal.

Before using a radiator cap tester, wet the relief valve
and pressure valve with engine coolant or water.
(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 radiator
cap.
(b) Pump the tester and measure the relief valve opening
pressure.
Pump speed: 1 push within 1 second
NOTICE:
This pump speed is for the first pump only (in order to close
the vacuum valve). After this, the pump speed can be re-
duced.
Standard opening pressure:
83 - 113 kPa (0.85 - 1.15 kgf/cm
2, 12.1 - 16.4 psi)
Minimum opening pressure:
69 kPa (0.7 kgf/cm
2, 10.0 psi)
HINT:
Use the tester's maximum reading as the opening pressure.
If the opening pressure is less than minimum, replace the radia-
tor cap.
3. INSPECT COOLING SYSTEM FOR LEAKS
(a) Fill the radiator with coolant, and attach a radiator cap tes-
ter.
(b) Warm up the engine.
(c) Pump it to 127 kPa (1.3 kgf/cm
2, 18.5 psi), and check that
the pressure does not drop.
If the pressure drops, check the hoses, radiator or water pump
for leaks. If no external leaks are found, check the heater core,
cylinder block and cylinder head.
4. REINSTALL RADIATOR CAP

CO0WT-01
B09040
- COOLINGRADIATOR
CO-17
1210 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
HINT:
At the time of installation, please refer to the following items.

Start the engine, and check for coolant and A/T fluid
leaks.

Check the A/T fluid level (See page DI-160).
1. REMOVE BATTERY AND BATTERY TRAY
2. REMOVE ENGINE UNDER COVER
3. DRAIN ENGINE COOLANT
4. DISCONNECT NO.3 ENGINE ROOM RELAY BLOCK
FROM RADIATOR
5. DISCONNECT NO.1 COOLING FAN CONNECTOR
6. DISCONNECT WIRE CLAMPS FROM NO.1 FAN
SHROUD
7. DISCONNECT NO.2 COOLING FAN CONNECTOR
8. DISCONNECT NO.1 ECT SWITCH WIRE CONNECTOR
9. DISCONNECT WIRE CLAMPS FROM NO.2 FAN
SHROUD
10. DISCONNECT UPPER RADIATOR HOSE FROM RA-
DIATOR
11. DISCONNECT LOWER RADIATOR HOSE FROM RA-
DIATOR
12. DISCONNECT A/T OIL COOLER HOSES FROM RA-
DIATOR
13. REMOVE RADIATOR AND COOLING FANS AS-
SEMBLY
(a) Remove the 2 bolts and 2 upper supports.
Torque: 12.8 N´m (130 kgf´cm, 9 ft´lbf)
(b) Lift out the radiator, and remove the radiator and cooling
fans assembly.
(c) Remove the 2 lower supports.
14. REMOVE NO.1 ECT SWITCH
15. REMOVE NO.1 COOLING FAN FROM RADIATOR
Remove the 2 bolts and cooling fan.
Torque: 5.0 N´m (50 kgf´cm, 44 in.´lbf)
16. REMOVE NO.2 COOLING FAN FROM RADIATOR
Remove the 2 bolts and cooling fan.
Torque: 5.0 N´m (50 kgf´cm, 44 in.´lbf)

CO02T-03
B04153Stud BoltJiggle Valve
15°15°
CO-12
- COOLINGTHERMOSTAT
1205 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
1. PLACE THERMOSTAT IN WATER PUMP
(a) Install a new gasket on to the thermostat.
(b) Align the thermostat jiggle valve with the upper stud bolt,
and insert the thermostat in the water inlet housing.
HINT:
The jiggle valve may be set within 15° of either side of the pre-
scribed position.
2. INSTALL WATER INLET
Install the water inlet with the 3 nuts.
Torque: 8 N´m (80 kgf´cm, 69 in.´lbf)
3. INSTALL WATER INLET PIPE
(a) Install a new O-ring to the water inlet pipe.
(b) Apply soapy water to the O-ring.
(c) Connect the water inlet pipe to the water inlet.
(d) Install the bolt holding the water inlet pipe to the LH cylin-
der head.
Torque: 19.5 N´m (200 kgf´cm, 14 ft´lbf)
4. INSTALL ENGINE WIRE PROTECTOR
5. CONNECT NO.2 ECT SWITCH CONNECTOR
6. CONNECT HEATER HOSES
7. REINSTALL AIR CLEANER HOSE WITH RESONATOR
8. INSTALL V-BANK COVER
(a) Using 5 mm hexagon wrench, install the V-bank cover
with the 3 cap nuts.
(b) Press down the V-bank cover fastener.
9. FILL WITH ENGINE COOLANT
10. START ENGINE AND CHECK FOR LEAKS
11. RECHECK ENGINE COOLANT LEVEL

CO0SW-02
A10518
5 mm
Hexagon
Wrench
B08906
B06725
B04150
CO-10
- COOLINGTHERMOSTAT
1203 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
HINT:
Removal of the thermostat would have an adverse effect, caus-
ing a lowering of cooling efficiency. Do not remove the thermo-
stat, even if the engine tends to overheat.
1. DRAIN ENGINE COOLANT
2. REMOVE V-BANK COVER
(a) Using a 5 mm hexagon wrench, remove the 3 cap nuts.
(b) Loosen the V-bank cover fastener counterclockwise.
(c) Remove the V-bank cover.
3. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
4. REMOVE AIR CLEANER HOSE WITH RESONATOR
5. DISCONNECT HEATER HOSES
6. DISCONNECT NO.2 ECT SWITCH CONNECTOR
7. DISCONNECT ENGINE WIRE PROTECTOR FROM
WATER INLET AND RH CYLINDER HEAD
Remove the nut and disconnect the clamp, and disconnect the
engine wire protector from the water inlet and cylinder head.
8. DISCONNECT WATER INLET PIPE FROM WATER IN-
LET AND LH CYLINDER HEAD
(a) Remove the bolt, and disconnect the inlet pipe from the
water inlet.
(b) Remove the O-ring from the inlet pipe.
9. REMOVE WATER INLET AND THERMOSTAT
(a) Remove the 3 nuts, water inlet and thermostat.
(b) Remove the gasket from the thermostat.

CO02M-03
A10834
RH Fender Apron Seal
Generator Drive Belt
Engine Moving
Control Rod
No.2 RH Engine
Mounting Bracket
Ground Strap
Connector PS Pump Drive Belt
Engine Coolant Reservoir Hose
: Specified torque
64 (650, 47)
32 (320, 23)
N´m (kgf´cm, ft´lbf)
- COOLINGWATER PUMP
CO-3
1196 Author
: Date
:
2001 AVALON (RM808U)
WATER PUMP
COMPONENTS