2003 Lexus GS300 ignition

± COOLING SYSTEM
Capacity
9.0 L (9.5 qt., 7.9 lmp.qt.)
Coolant typeªToyota Genuine Long Life Coolantº or equivalent
With ethylene±glycol type coolant for a proper corrosion protection of
aluminum components
Do not use alcohol type antifreeze or plain water alone.
NOTE:
ªToyota Genuine Long Life Coolantº is filled in your Lexus vehicle. In order to avoid technical problems, we strongly recommend
using ªToyota Genuine Long Life Coolantº or equivalent. Please contact your Lexus dealer for further details.
± IGNITION SYSTEM
Spark plug ± Make DENSO
NGK
± Gap
SK20R11
IFR6A11
1.1 mm (0.043 in.)
± ELECTRICAL SYSTEM
Battery ± Open voltage at 20C (68F):
± Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the key is removed with all the
lights turned off]
5A max.

± COOLING SYSTEM
Capacity
7.7 L (8.1 qt., 6.8 lmp.qt.)
Coolant typeªToyota Genuine Long Life Coolantº or equivalent
With ethylene±glycol type coolant for a proper corrosion protection of
aluminum components
Do not use alcohol type antifreeze or plain water alone.
NOTE:
ªToyota Genuine Long Life Coolantº is filled in your Lexus vehicle. In order to avoid technical problems, we strongly recommend
using ªToyota Genuine Long Life Coolantº or equivalent. Please contact your Lexus dealer for further details.
± IGNITION SYSTEM
Spark plug ± Make DENSO
± Gap
SK16R±P11
1.1 mm (0.043 in.)
± ELECTRICAL SYSTEM
Battery ± Open voltage at 20C (68F):
± Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the key is removed with all the
lights turned off]
5A max.

FUEL PUMP SHUT OFF SYSTEM
The fuel pump shut off system stops supplying fuel to the
engine to minimize the risk of fuel leakage when the engine
stalls or an airbag inflates upon collision. To restart the engine
after the fuel pump shut off system activates, turn the ignition
switch to ªACCº or ªLOCKº once and start it.
CAUTION
Inspect the ground under the vehicle before restarting
the engine. If you find that liquid has leaked onto the
ground, it is the fuel system that has been damaged and
it is in need of repair. In this case, do not restart the
engine.
FACTS ABOUT ENGINE OIL
CONSUMPTION
Functions of engine oil
Engine oil has the primary function of lubricating and cooling
the inside of the engine, and plays a major role in maintaining
the engine in proper working order.
Engine oil consumption
It is normal that an engine should consume some engine
oil during normal engine operation. The causes of oil
consumption in a normal engine are as follows.
Oil is used to lubricate pistons, piston rings and cylinders.
A thin film of oil is left on the cylinder wall when a piston
moves downwards in the cylinder. High negative pressure
generated when the vehicle is decelerating sucks some of
this oil into the combustion chamber. This oil as well as
some part of the oil film left on the cylinder wall is burned by
the high temperature combustion gases during the
combustion process.
Oil is also used to lubricate the stems of the intake valves.
Some of this oil is sucked into the combustion chamber
together with the intake air and is burned along with the fuel.
High temperature exhaust gases also burn the oil used to
lubricate the exhaust valve stems.