Chevrolet 1998 Tracker Owner's Manual page 263

A
CAUTION:
Turning the radiator pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids
to
blow out and burn you
badly. With the coolant
recovery
tank, you will
almost never have to add coolant
at the radiator.
Never turn the radiator pressure cap
--
even a
little
--
when the engine and radiator are hot.
Add coolant mixture at the recovery tank, but be careful
not to spill it.
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. Don't spill coolant on a hot engine.
Radiator Pressure Cap
*
NOTICE:
Your radiator cap is a 13 psi (90 kPa)
pressure-type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating. Be sure the arrows on the cap
line up with the overflow tube on the radiator
filler neck.
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