Toyota 4runner 2009 User Manual page 376

4-3. Do-it-yourself maintenance
Engine coolant
The coolant level is satisfactory if it is between the F (Full) and L
(Low) lines on the reservoir when the engine is cold.
If the coolant level drops within a short time after replenishing
n
Visually check the radiator, hoses, reservoir cap, radiator cap, drain cock
and water pump.
If you cannot find a leak, have your Toyota dealer pressure test the cap and
check for leaks in the cooling system.
n Coolant selection
Only use "Toyota Super Long Life Coolant" or similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite and non-borate coolant with
long-life hybrid organic acid technology.
U.S.A.: "Toyota Super Long Life Coolant" is a mixture of 50% coolant and
50% deionized water. (Enabled: -31°F [-35°C])
Canada: "Toyota Super Long Life Coolant" is a mixture of 55% coolant and
45% deionized water. (Enabled: -44°F [-42°C])
For more details about engine coolant, contact your Toyota dealer.
CAUTION
When the engine is hot
n
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing burns or other injuries.
380
Reservoir cap
F
L
If the level is on or below the L
line, add coolant up to the F line.