Lexus GS300 1999 Engine

ENGINE
398
62G004±1

1Reservoir cap 2Upper line 3Lower line
Look at the see±through coolant reservoir when the
engine is cold. The coolant level is satisfactory if it
is between theºFULLº and ºLOWº lines on the
reservoir. If the level is low, add ethylene±glycol
type coolant for a proper corrosion protection of
aluminum components.
The coolant level in the reservoir will vary with engine
temperature. However, if the level is on or below the
ºLOWº line, add coolant. Bring the level up to the ºFULLº
line.
Always use ethylene±glycol type coolant for a proper
corrosion protection of aluminum components. See
information in the next column.If the coolant level drops within a short time after
replenishing, there may be a leak in the system. Visually
check the radiator, hoses, engine coolant filler cap,
radiator cap and drain cock and water pump.
If you can find no leak, have your Lexus dealer test the
cap pressure and check for leaks in the cooling system.

ENGINE
399
CAUTION
To prevent burning yourself, do not remove the radiator
cap when the engine is hot.

ENGINE
400
Coolant type selection
Use of improper coolants may damage your engine
cooling system. Your coolant must contain
ethylene±glycol type coolant for a proper corrosion
protection of your engine that contains aluminum
components. Use ºToyota Long Life Coolantº or
equivalent.
In addition to preventing freezing and subsequent
damage to the engine, this type of coolant will also
prevent corrosion. Further supplemental inhibitors or
additives are neither needed nor recommended.
Read the coolant container for information on freeze
protection. Follow the manufacturer's directions for how
much to mix with plain water (preferably demineralized
water or distilled water). The total capacity of the cooling
system is given on page 380.
We recommend to use 50% solution for your Lexus, to
provide protection down to about ±35C (±31F). When
it is extremely cold, to provide protection down to about
±50C (±58F), 60% solution is recommended. Do not
use more than 70% solution for better coolant
performance.
NOTICE
Do not use alcohol type antifreeze or plain water
alone.

ENGINE
401
SPARK PLUGS
GS400
62R031a
Your engine is fitted with iridium±tipped spark
plugs.
NOTICE
Use only iridium±tipped spark plugs for your
engine performance and smooth drivability.

ENGINE
402
GS300
62G008
Your engine is fitted with twin ground electrode
platinum±tipped spark plugs.
NOTICE
Use only twin ground electrode platinum±tipped
spark plugs for your engine performance.