Chevrolet 1994 Cavalier Owner's Manual page 142

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2.2L
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How to Add Coolant to the
2.21
14 Engne at the Radiator
1.
You can remove the radiator pressure
cap when the cooling system,
including the radiator pressure cap
and upper radiator hose, is no longer
hot. Turn the pressure cap slowly to
the left until it first stops. (Don't
press down while turning the
pressure cap.) If you hear a hiss, wait
for that to stop. A hiss means there is
still some pressure left.
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2.2L
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2. Then keep turning the pressure cap,
but now push down as you turn it.
Remove the pressure cap.
3 . Fill the radiator with the proper mix,
up to the base of the filler neck.