Chevrolet 2007 Cobalt, Owner'S Manual

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CAUTION:
You can be burned if you spill coolant on
hot engine parts. Coolant contains
ethylene glycol, and it will burn if the
engine parts are hot enough. Do not spill
coolant on a hot engine.
1. You can remove the fill neck pressure cap
when the intercooler system, including the
upper intercooler hose, is no longer hot. Turn
the pressure cap slowly counterclockwise
about one-quarter of a turn. If you hear a hiss,
wait for that to stop. This will allow any
remaining pressure to be vented.
2. Then keep turning the pressure cap slowly,
and remove it.
3. Add the proper DEX-COOL
®
coolant mixture
to the fill neck, until there is coolant visible in
the horizontal tube section of the fill neck.
4. With the fill neck pressure cap off, start the
engine and let it run for at least 30 seconds.
Watch out for the engine cooling fan. Turn the
engine off. By this time, the coolant level
inside the fill neck may be lower. If the level
drops so that coolant is no longer visible in the
horizontal tube section of the fill neck, add
more of the DEX-COOL
®
coolant mixture to
the fill neck until the level is again visible in the
horizontal tube section.
5. Replace the intercooler system pressure cap.
Be sure the pressure cap is hand-tight and
fully seated.
If the coolant is not at the proper level when
the system cools down again, see your dealer.
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