Checking The Engine Coolant Level; Coolant Type Selection - Toyota 2007 Tundra Owner's Manual

07 04.26
Checking the engine coolant
level
Look at the see−through coolant reser-
voir when the engine is cold. The cool-
ant level is satisfactory if it is between
the "FULL" and "LOW" lines on the
reservoir. If the level is low, add the
coolant. (For the coolant type,
"Coolant type selection" described be-
low.)
The coolant level in the reservoir will vary
with engine temperature. However, if the
level is on or below the "LOW" line, add
coolant. Bring the level up to the "FULL"
line.
If the coolant level drops within a short
time after replenishing, there may be a
leak in the system. Visually check the
radiator, hoses, radiator cap and drain
cock and water pump.
If you can find no leak, have your Toyota
dealer test the cap pressure and check
for leaks in the cooling system.
CAUTION
To prevent burning yourself, do not
remove the radiator cap when the en-
gine is hot.
546

Coolant type selection

Use of improper coolants may damage
your engine cooling system.
Only use "Toyota Super Long Life Coolant"
or similar high quality ethylene glycol
see
based non−silicate, non−amine, non−nitrite,
and non−borate coolant
hybrid organic acid technology. (Coolant
with long−life hybrid
technology is a combination
phosphates and organic acids.)
For the U.S.A.—"Toyota Super Long Life
Coolant" is a mixture of 50% coolant and
50% deionized water. This coolant pro-
vides protection down to about −35_C
(−31_F).
For Canada—"Toyota Super
Coolant" is a mixture of 55% coolant and
45% deionized water. This coolant pro-
vides protection down to about −42_C
(−44_F).
NOTICE
Do not use plain water alone.
with long−life
organic acid
of low
Toyota recommends "Toyota Super Long
Life Coolant", which has been tested to
ensure that it will not cause corrosion nor
result in malfunction
Long Life
coolant system with proper usage. "Toyota
Super Long Life Coolant" is formulated
with long−life
technology and
designed to avoid engine cooling system
malfunction on Toyota vehicles.
Please contact your Toyota dealer for
further details.
2007 TUNDRA from Jul. '07 Prod. (OM34463U)
of your engine
hybrid organic acid
has been specifically