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Cars with a V8 engine have a low coolant warning light in the instruments. To
check that the bulb is working the light is shown for a few seconds when the
ignition is first turned ON.
If the light is shown when driving it indicates that the engine coolant level is very
low. You should check the level as soon as possible. As this may involve checking
the level when the coolant is hot, refer to the instructions in "Overheating" in
Chapter 6 and the relevant cautions in that chapter.
Regardless of the low coolant light, the
coolant level should be checked at least
weekly, by looking at the level in the plastic
tank when the engine is cold. For ease of
location, the coolant cap is coloured yellow.
The coolant level should be at or slightly
above the "COLD FILL" mark at the centre
weld joint when the engine is cold. The level
rises when the engine is running and drops
again when the engine cools down. If the
level falls below the weld joint, coolant
should be topped up to a little over the
mark. Do not overfill, as coolant requires
space to expand when warmed up.
The coolant in the V8 engine conforms to GM6277M specification, and is otherwise
known as Dex-Cool, and can be bought from your Holden Dealer. The concentration
used is 50% water and 50% Dex-Cool.
If the coolant requires topping up, pre-mix a solution of 50% Dex-Cool and 50% water
in a container, then (when the engine is cold) undo the cap and pour the fluid into the
plastic tank. When the level is correct, replace the cap and turn clockwise until secure.
Failure to use Dex-Cool at 50% concentration may result in voiding your warranty.
In emergency situations, plain water may be used temporarily until Dex-Cool is obtained
(as soon as possible) from the nearest Holden Dealer.
Dex-Cool works in three ways: it contains special corrosion inhibitors, it helps the cooling
system in hot weather by increasing the boiling point and it protects against freezing
down to -3rC, provided the 50% concentration is maintained.
If you regularly have to top up the cooling system you should see your Holden Dealer.
CAUTION:
Corrosion inhibitors and anti-freeze fluids are poisonous. Use extreme care when
handling. If swallowed, seek medical attention. Do not remove the coolant cap if the
engine and radiator are still hot. Scalding fluid and steam can be blown out under
pressure which could cause serious burns.
Refer to Chapter 6 if the low coolant light
a lot of coolant.
COOLANT LEVEL- VB ENGINE
�
Chapter 7
WEEKLY CHECKS
shows or if the engine overheats or loses
7-7
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