water pump TOYOTA CAMRY V20 1986 Service Information

The cooling system is composed of the water jacket (inside the cylinder block and cylinder head), radiator,
water pump, thermostat, electric fan, hoses and other components.
Coolant which is heated in the water jacket is pumped to the radiator, through which an electric fan blows air
to cool the coolant as it passes through. Coolant which has been cooled is then sent back to the engine by
the water pump, where it cools the engine.
The water jacket is a network of channels in the shell of the cylinder block and cylinder head through which
coolant passes. It is designed to provide adequate cooling of the cylinders and combustion chambers which
become heated during engine operation.
RADIATOR
The radiator performs the function of cooling the coolant which has passed through the water jacket and be-
come hot, and it is mounted in the front of the vehicle. The radiator consists of an upper tank and lower tank,
and a core which connects the two tanks. The upper tank contains the inlet for coolant from the water jacket
and the filler inlet. It also has a hose attached through which excess coolant or steam can flow. The lower
tank has an outlet and drain cock for the coolant. The core contains many tubes through which coolant flows
from the upper tank to the lower tank as well as cooling fins which radiate heat away from the coolant in the
tubes.
The air sucked through the radiator by the electric fan, as well as the wind generated by the vehicle's travel,
passes through the radiator, cooling the coolant. Models with automatic transmission include an automatic
transmission fluid cooler built into the lower tank of the radiator. A fan with an electric motor is mounted be-
hind the radiator to assist the flow of air through the radiator. The fan operates when the coolant tempera-
ture becomes high in order to prevent it from becoming too high.
RADIATOR CAP
The radiator cap is a pressure type cap which seals the radiator, resulting in pressurization of the radiator as
the coolant expands. The pressurization prevents the coolant from boiling even when the coolant tempera-
ture exceeds 100°C (212°F). A relief valve (pressurization valve) and a vacuum valve (negative pressure
valve) are built into the radiator cap. The relief valve opens and lets steam escape through the overflow pipe
when the pressure generated inside the cooling system exceeds the limit (coolant temperature: 110 ±
120°C, 230 ± 248°F, pressure; 0.3 ±1.0 kg/cm
2, 4.3 ±14.2 psi, 29.4 ± 98.1 kPa). The vacuum valve opens to
alleviate the vacuum which develops in the coolant system after the engine is stopped and the coolant tem-
perature drops.
The valves's opening allows the coolant in the reservoir tank to return to the cooling system.
RESERVOIR TANK
The reservoir tank is used to catch coolant which overflows the cooling system as a result of volumetric ex-
pansion when the coolant is heated. The coolant in the reservoir rank returns to the radiator when the cool-
ant temperature drops, thus keeping the radiator full at all times and avoiding needless coolant loss. Check
the reservoir tank level to find out if the coolant needs to be replenished.
WATER PUMP
The water pump is used for forced circulation of coolant through the cooling system. It is mounted on the
front of the cylinder block and driven by a timing belt.
THERMOSTAT
The thermostat has a wax type by±pass valve and is mounted in the water inlet housing. The thermostat in-
cludes a type of automatic valve operated by fluctuations in the coolant temperature. This valve closes when
the coolant temperature drops, preventing the circulation of coolant through the engine and thus permitting
the engine to warm up rapidly. The valve opens when the coolant temperature has risen, allowing the cir-
culation of coolant. Wax inside the thermostat expands when heated and contracts when cooled. Heating
the wax thus generates pressure which overpowers the force of the spring which keeps±the valve closed,
thus opening the valve. When the wax cools, its contraction causes the force of the spring to take effect
once more, closing the valve. The thermostat in this engine operates at a temperature of 82°C (180°F).
± COOLING SYSTEMDescriptionCO±3

3. (3S±FE)
REPLACE ENGINE COOLANT
(a) Remove the radiator cap.
CAUTION: To avoid the danger of being burned, do not re-
move it while the engine and radiator are still hot
as fluid and steam can be blown out under pressure.
(b) Drain the coolant from the .radiator and engine drain cocks.
(Engine drain cock at the right rear of engine block.)
(c) Close the drain cocks.
Torque (Engine drain cock):
130 kg±cm (9 ft±Ib, 13 N±m) HINT: If the engine tends to overheat, removal of the
thermostat will adversely effect cooling efficiency.
CHECK AND REPLACEMENT OF
ENGINE COOLANT
1. CHECK ENGINE COOLANT LEVEL AT RESERVE TANK
The coolant level should be between the ºLOWº and
ºFULLº lines.
If low, check for leaks and add coolant up to the ºFULLº
line.
Dirt, leaves or insects on radiator or condenser
Hoses, Water pump, thermostat housing, radiator,
heater, core, plugs or head gasket leakage
Thermostat faulty
Incorrect ignition timing
Electric cooling system faulty
Radiator hose plugged or rotted
Water pump faulty
Radiator plugged or cap faulty
Cylinder head or block cracked or water passage
clogged
2. CHECK ENGINE COOLANT QUALITY
There should not be any excessive deposits of rust or scales
around the radiator cap or radiator filler hole, and the cool-
ant should be free from oil.
If excessively dirty, replace the coolant.
Check thermostat
Reset tinning
Inspect electric cooling system
Replace hose
Replace water pump
Check radiator and cap
Repair as necessary
TROUBLESHOOTING
CO±12, 13
IG±17, 20
CO±20, 22 Clean radiator or condenser
Repair as necessary Engine overheats
Possible causeRemedy Problem
CO±6, 9 Page
± COOLING SYSTEM
TroubleshootingCO±4

3. (3S±FE)
REPLACE ENGINE COOLANT
(a) Remove the radiator cap.
CAUTION: To avoid the danger of being burned, do not re-
move it while the engine and radiator are still hot
as fluid and steam can be blown out under pressure.
(b) Drain the coolant from the .radiator and engine drain cocks.
(Engine drain cock at the right rear of engine block.)
(c) Close the drain cocks.
Torque (Engine drain cock):
130 kg±cm (9 ft±Ib, 13 N±m) HINT: If the engine tends to overheat, removal of the
thermostat will adversely effect cooling efficiency.
CHECK AND REPLACEMENT OF
ENGINE COOLANT
1. CHECK ENGINE COOLANT LEVEL AT RESERVE TANK
The coolant level should be between the ºLOWº and
ºFULLº lines.
If low, check for leaks and add coolant up to the ºFULLº
line.
Dirt, leaves or insects on radiator or condenser
Hoses, Water pump, thermostat housing, radiator,
heater, core, plugs or head gasket leakage
Thermostat faulty
Incorrect ignition timing
Electric cooling system faulty
Radiator hose plugged or rotted
Water pump faulty
Radiator plugged or cap faulty
Cylinder head or block cracked or water passage
clogged
2. CHECK ENGINE COOLANT QUALITY
There should not be any excessive deposits of rust or scales
around the radiator cap or radiator filler hole, and the cool-
ant should be free from oil.
If excessively dirty, replace the coolant.
Check thermostat
Reset tinning
Inspect electric cooling system
Replace hose
Replace water pump
Check radiator and cap
Repair as necessary
TROUBLESHOOTING
CO±12, 13
IG±17, 20
CO±20, 22 Clean radiator or condenser
Repair as necessary Engine overheats
Possible causeRemedy Problem
CO±6, 9 Page
± COOLING SYSTEMCheck and Replacement of Engine CoolantCO±4

REMOVAL OF WATER PUMP
1. DRAIN ENGINE COOLANT (See page CO±4)
2. DISCONNECT WATER TEMPERATURE SWITCH
CONNECTOR
3. DISCONNECT RADIATOR LOWER HOSE FROM
WATER INLET HOUSING
4. REMOVE TIMING BELT, PULLEYS
(See pages EM±23 to 26)
5. REMOVE WATER PUMP AND WATER PUMP COVER
ASSEMBLY .
(a) Remove the two nuts holding the pump to the water by±
pass pipe.
WATER PUMP (3S±FE)
COMPONENTS
± COOLING SYSTEMWater Pump (3S±FE)CO±6

INSTALLATION OF WATER PUMP
(See page CO±6)
1. ASSEMBLE WATER PUMP AND WATER PUMP COVER
Install anew gasket and the pump to the pump cover with the
three bolts.
Torque: 90 kg±cm (78 in.±Ib, 8.8 N±m)
INSPECTION OF WATER PUMP
INSPECT WATER PUMP
Turn the pulley and check that the water pump bearing
moves smoothly and quietly.
2. INSTALL WATER PUMP AND WATER PUMP COVER
ASSEMBLY
(a) Install two new 0±rings and gasket to the pump cover and wa-
ter by±pass pipe. 6. DISASSEMBLE WATER PUMP AND WATER PUMP
COVER
Remove the three bolts, water pump and gasket from the
pump cover. (b) Remove the three bolts in the sequence shown.
(c) Pull out the water pump together with pump cover.
(d) Remove the two Q±rings and gasket.
± COOLING SYSTEMwater Pump (3S±FE)CO±7

(b) Apply a fight coat of engine oil on the 4±ring of the water
by±pass pipe.
(c) Connect the pump cover to the water by±pass pipe. Do
not install the nuts yet.
(d) Install the water pump with the three bolts. Torque the
bolts in the sequence shown.
Torque: 95 kg±cm (82 in.±Ib, 9.3 N±m)
3. INSTALL PULLEYS AND TIMING BELT (See pages
EM±29 to 33)
4. CONNECT RADIATOR LOWER HOSE
5. CONNECT WATER TEMPERATURE SWITCH
CONNECTOR
6. FILL WITH ENGINE COOLANT (See page CO±5) (e) Install the two nuts holding the pump cover to the water
by±pass pipe.
Torque: 95 kg±cm (82 in.±Ib, 9.3 N±m)
± COOLING SYSTEMWater Pump PS±FE)CO±8

REMOVAL OF WATER PUMP
1. DRAIN ENGINE COOLANT (See page CO±5)
2. DISCONNECT RADIATOR LOWER NOSE FROM
WATER INLET PIPE
3. DISCONNECT TIMING BELT FROM WATER PUMP
PULLEY (See pages EM±34 to 39)
4. REMOVE WATER INLET PIPE
(a) Remove the bolt holding the water inlet pipe to the alternator
belt adjusting bar.
(b) Remove the water inlet pipe and 0±ring.
5. REMOVE WATER INLET AND THERMOSTAT
(See steps 4 and 5 on page CO±13)
WATER PUMP(2VZ±FE)
COMPONENTS
± COOLING SYSTEMWater Pump (2VZ±FE)CO±9

INSTALLATION OF WATER PUMP
(See page CO±9)
1. INSTALL WATER PUMP
(a) Remove any old packing (FIPG) material and be careful not
to drop any oil on the contact surfaces of the water pump
and cylinder block.
wUsing a razor blade and gasket scraper, remove all
the old packing (FIPG) material from the gasket surfaces
and sealing groove.
wThoroughly clean all components to remove all the loose
material.
wUsing a non±residue solvent, clean both sealing surfaces.
(b) Apply seal packing to the water pump groove.
Seal packing: Part No.08826±00100 or equivalent
wInstall a nozzle that has been cut to a 2 ± 3 mm
(0.08 ± 0.12 in.) opening.
HINT: Avoid applying an excessive amount to the surface.
wParts must be assembled within 5 minutes of application.
Otherwise the material must be removed and reapplied.
wImmediately remove nozzle from the tube and reinstall cap.
(c) Install the water pump with the seven bolts.
Torque: 200 kg±cm (14 ft±lb, 20 N±m)
2. INSTALL WATER INLET AND THERMOSTAT
(See steps 1 and 2 on page CO±13) 6. REMOVE WATER PUMP
(a) Remove the seven bolts.
(b) Remove the water pump by prying a screwdriver between
the water pump and cylinder block.
INSPECTION OF WATER PUMP
INSPECT WATER PUMP
Turn the pulley and check that the water pump bearing
moves smoothly and quietly.
± COOLING SYSTEMWater Pump (2VZ±FE)CO±10

3. INSTALL WATER INLET PIPE
(a) Install a new 0±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 alternator
belt adjusting bar.
Torque: 200 kg±cm (14 ft±Ib, 20 N±m)
4. INSTALL TIMING BELT (See pages EM±42 to 46)
5. CONNECT RADIATOR LOWER HOSE
6. FILL WITH ENGINE COOLANT (See page CO±5)
± COOLING SYSTEMWater Pump (2VZ±FE)CO±11

THERMOSTAT (3S±FE)
REMOVAL OF THERMOSTAT
1. DRAIN ENGINE COOLANT (See page CO±4)
2. DISCONNECT WATER TEMPERATURE SWITCH
CONNECTOR
3. DISCONNECT RADIATOR FROM WATER INLET
HOUSING
4. REMOVE WATER INLET HOUSING
Remove the two nuts and water inlet housing from the
waterpump.
5. REMOVE THERMOSTAT AND GASKET
INSPECTION OF THERMOSTAT
INSPECT THERMOSTAT
HINT: The thermostat is numbered with the valve opening
temperature.
(a) Immerse the thermostat in water and gradually heat the wa-
ter.
(b) Check the valve opening temperature.
Valve opening temperature:
80 ± 845C (176 ± 1835F)
If the valve opening temperature is not as specified, re-
place the thermostat.
(e) Check the valve lift.
Valve lift:
8 mm (0.31 in.) or more at 95°C (203°F)
If the valve lift is less than specification, replace the
thermostat.
INSTALLATION OF THERMOSTAT
1. PLACE THERMOSTAT IN WATER INLET HOUSING
(a) Install a new gasket to the thermostat.
(b) Align the jiggle valve of the thermostat with protrusion of the
water inlet housing and, insert the thermostat in the water
inlet housing.
2. INSTALL WATER INLET HOUSING AND THERMOSTAT
ASSEMBLY
Install the water inlet housing and thermostat assembly with
the two nuts.
Torque: 90 kg±cm (78 in.±Ib, 8.8 N±m)
3. CONNECT RADIATOR LOWER HOSE
4. CONNECT WATER TEMPERATURE SWITCH
CONNECTOR
5. FILL WITH ENGINE COOLANT (See page CO±5)
6. START ENGINE AND CHECK FOR LEAKS
± COOLING SYSTEMThermostat (3S±FE)CO±12