Adding Coolant - Chevrolet 2006 Optra Owner's Manual

Checking Coolant
The engine coolant surge tank is located in the rear of
the engine compartment on the driver's side. See
Engine Compartment Overview on page 5-12 for more
information on location.
5-22
CAUTION:
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Turning the surge tank pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn you
badly. Never turn the surge tank pressure
cap — even a little — when the engine and
radiator are hot.
The vehicle must be on a level surface. When your
engine is cold, the coolant level should be between the
Maximum (A) and Minimum (B) marks on the coolant
surge tank. The level rises at engine operation
temperature and drops again when the engine
cools down.

Adding Coolant

If the level falls below the Minimum (B) mark, add the
proper coolant mixture at the surge tank, but only when
the engine is cool. If the surge tank is empty, a
special fill procedure is necessary. See Cooling System
on page 5-24 for instructions on "How to Add Coolant
to the Coolant Surge Tank."