1998 Chevrolet Corvette Owner's Manual - Page 270

Adding Coolant Turning the surge tank pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow and burnyou badly. out Never turn the surge tank pressure cap even a little when the engine and radiatorare hot. -- -- iA I If you need more coolant, add the proper DEX-COOL@ coolant mixture at the surge tank, but only when the engine is cool. When your engineis cold, the coolant level should be at the FULL COLD mark. Don't overfill the surge tank. Too much coolant can result in an ovefflow when the fluid is hot. If the LOW COOLANT message comes on, it means you're low on engine coolant. r CAUTION: You can be burned if you spillcoolant on hot engine parts. Coolant containsethylene glycol, hot and it will burn if the engine parts are enough. Don't spill coolant onhot engine. a When replacing the pressure cap, make sure it istight. 6-25