2010 TOYOTA 4RUNNER radiator

504 4-3. Do-it-yourself maintenance
4RUNNER_U
Radiator and condenserCheck the radiator and condenser and clear away any foreign
objects.
If either of the above parts is extr emely dirty or you are not sure of
their condition, have your vehicle inspected by your Toyota dealer.
CAUTION
■When the engine is hot
Do not remove the engine coolant reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing burns or other injuries.
NOTICE
■When adding coolant
Coolant is neither plain water nor stra ight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause burn\
s.

5
When trouble arises
603
5-2. Steps to take in an emergency
4RUNNER_U
If your vehicle overheats
If your engine overheats:Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine. Carefully lift the hood after the steam sub-
sides and then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. (
P. 497)
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the temperature of the engine (shown on the
instrument panel) begins to fall and then stop the engine.
If the fan is not operating:
Stop the engine immediately and call your Toyota dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and
inspect the radiator core (radi-
ator) for any leaks.
STEP 1
STEP 2
STEP 3
STEP 4
CTH52AS043
STEP 5

604 5-2. Steps to take in an emergency
4RUNNER_U
■Overheating
If you observe the following, your vehicle may be overheating:
● The engine coolant temperature gauge enters the red zone or a loss of
power is experienced.
● Steam comes out from under the hood.
CAUTION
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● Keep hands and clothing away from the fan and drive belt while the engine
is running.
● Do not loosen the radiator cap, or coolant reservoir cap while the engine
and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
Add engine coolant if neces-
sary.
Water can be used in an emer-
gency if engine coolant is
unavailable.
( P. 616)
Have the vehicle inspected at the nearest Toyota dealer as soon as
possible.
CTH52AS033
STEP 6

658 Alphabetical index
4RUNNER_U
Radiator .................................... 504
Radio ......................................... 317
Rear differential lock system .................................... 235
Rear seats Adjustment .............................. 65
Folding down ...............67, 69, 72
Rear step bumper ...................... 57
Rear turn signal lights Replacing light bulbs ............. 541
Wattage .................................622
Rear view monitor system ......218
Rear window ............................... 94
Rear window defogger ............310
Rear window wiper .................. 207
Replacing
Fuses .................................... 531
Key battery ............................ 528
Light bulbs ............................. 541
Tires ......................................578
Reporting safety defects for U.S. owners ......................646
Roll sensing of curtain shield airbags off switch....... 127
Roof luggage carrier ................267
Safety Connect .........................469
Seat belts
Adjusting the seat belt .............79
Automatic Locking Retractor ............................... 81
Child restraint system installation ...........................139
Cleaning and maintaining the seat belts ......................482
Emergency Locking
Retractor ............................... 81
How to wear your seat belt......79
How your child should wear the seat belt ..........................82 Pregnant women,
proper seat belt use .............. 81
Reminder light ....................... 568
Seat belt extenders ................. 82
Seat belt pretensioners ........... 80
Seat heaters ............................. 446
Seating capacity ...................... 273
Seats Adjustment ........................ 61, 65
Adjustment precautions .... 64, 75
Child seats/child restraint system installation .............. 139
Cleaning ................................ 481
Head restraints........................ 76
Properly sitting in the seat..... 112
Seat heaters.......................... 446
Service reminder indicators .............................. 189
Shift lever Automatic transmission ......... 173
Front-wheel drive .................. 223
If the shift lever cannot be shifted from P ..................... 592
Shift lock system ..................... 592
Side airbags ............................. 114
Side marker lights Replacing light bulbs ............. 541
Switch ................................... 198
Wattage................................. 622
Side mirrors Adjusting and folding............... 89
Slide deck ................................. 459
Smart key system Entry function .......................... 33
Starting the engine ................ 167
“SOS” button ........................... 469
Spare tire Inflation pressure .................. 621
Storage location .................... 578
Spark plug ................................ 616R
S