Saturn 2007 Ion Owner's Manual page 295

Checking Coolant
The surge tank is located on the driver's side of
the engine compartment. See Engine
Compartment Overview on page 280 for more
information on location.
CAUTION:
{
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 parked on a level surface.
When your engine is cold, the coolant level should
be near the cold fill line. When your engine is
warm, the level should be at the cold fill line or a
little higher.
295