Saturn 2004 L-Series Owner's Manual page 279

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1. You can remove the coolant surge tank pressure
cap when the cooling system, including the coolant
surge tank pressure cap and upper radiator
hose, is no longer hot. Turn the pressure cap slowly
counterclockwise (left) about one-quarter of a
turn. If you hear a hiss, wait for that to stop. This
will allow any pressure still left to be vented out the
discharge hose.
2. Then keep turning the pressure cap slowly, and
remove it.
3. Fill the coolant surge tank with the proper
DEX-COOL
®
coolant mixture, to the COLD line.
4. With the coolant surge tank pressure cap off, start
the engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the
engine cooling fans.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper DEX-COOL
to the coolant surge tank until the level reaches the
COLD line.
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight.
®
coolant mixture
5-33