Toyota Sequoia (2005). Manual - part 710

CO0IX–05

B07218

Jiggle Valve

30

°

30

°

–

COOLING

THERMOSTAT

CO–13

2829

INSTALLATION

1.

PLACE THERMOSTAT IN WATER INLET HOUSING

(a)

Install a new gasket to the thermostat.

(b)

Insert the thermostat into the water inlet housing with the
jiggle valve facing straight upward.

HINT:
The jiggle valve may be set within 30

°

 of either side of the pre-

scribed position.
2.

INSTALL WATER INLET

Install the water inlet with the 3 nuts.

Torque: 19 N·m (195 kgf·cm, 14 ft·lbf)

3.

FILL WITH ENGINE COOLANT

4.

START ENGINE AND CHECK FOR COOLANT LEAKS

5.

RECHECK ENGINE COOLANT LEVEL

B14807

CO1B9–02

CO–14

–

COOLING

RADIATOR

2830

RADIATOR

ON–VEHICLE CLEANING

INSPECT FINS FOR BLOCKAGE
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 fin, so keep the following injection distance.

Injection Pressure

Injection Distance

2,942 to 4,903 kpa

(30 to 50 kg/cm

2, 

427 to 711 psi)

300 mm (11.811 in)

4,903 to 7,845 kpa

(50 to 80 kg/cm

2, 

711 to 1,138 psi)

500 mm (19.685 in)

If the fins are bent, straighten them with a screwdriver
or pliers.

Never apply water directly onto the electronic compo-
nents.

CO0IZ–08

CO1242

Radiator Cap Tester

Radiator Cap

30

°

 or More

B07240

Radiator Cap Tester

–

COOLING

RADIATOR

CO–15

2831

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 blown out under pressure.

2.

INSPECT RADIATOR CAP

NOTICE:

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

Before using a radiator cap tester, wet the relief valve
and pressure valve with engine coolant or water.

When performing steps (a) and (b) below, keep the
tester at an angle of over 30

°

 above the horizontal.

(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 radiator cap 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.

Opening pressure:

Standard

74 to 103 kPa (0.75 to 1.05 kgf/cm

2

,10.7 to 14.9 psi)

Minimum

59 kPa (0.6 kgf/cm

2

, 8.6 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 118 kPa (1.2 kgf/cm

2

, 17.1 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 head.
4.

REINSTALL RADIATOR CAP

CO1D2–01

B07246

Radiator Assembly

A/T Oil Cooler Hose

Engine Under Cover (4WD)

Upper Radiator Hose

Lower Radiator Hose

x 5

N·m (kgf·cm, ft·lbf) : Specified torque

12 (120, 9)

No.1 Fan Shroud

No.2 Fan Shroud

Engine Under Cover (2WD)

Clip

Clip

CO–16

–

COOLING

RADIATOR

2832

COMPONENTS