Lexus GS450h2016 Service Manual page 354

354
6-3. Do-it-yourself maintenance
Coolant
The coolant level is satisfactory if it is between the "FULL" and "LOW" lines on
the reservoir when the hybrid system is cold.
Engine coolant reservoir
■
Reservoir cap
1
"FULL" line
2
"LOW" line
3
If the level is on or below the "LOW"
line, add coolant up to the "FULL"
line. (P. 457)
Power control unit coolant reservoir
■
Reservoir cap
1
"FULL" line
2
"LOW" line
3
If the level is on or below the "LOW"
line, add coolant up to the "FULL"
line. (P. 457)
Coolant selection
■
Only use "Toyota Super Long Life Coolant" or a 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.
(Minimum temperature: -31F [-35C])
Canada:
"Toyota Super Long Life Coolant" is a mixture of 55% coolant and 45% deionized water.
(Minimum temperature: -44F [-42C])
For more details about coolant, contact your Lexus dealer.
If the coolant level drops within a short time of replenishing
■
Visually check the radiator, hoses, engine/power control unit coolant reservoir caps,
drain cock and water pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the
cooling system.
GS450h_OM_OM30E99U_(U)