1998 Chevrolet Cavalier Owner's Manual - Page 286

Adding Coolant If you need more coolant, add the proper DEX-COOL@ coolant mixtureat the surge tank, but only when the engine is cool. Surge Tank Pressure Cap NOTICE: Your surge tank cap is a 15 psi (105 kPa) pressure-type cap andmust be tightly installedto prevent coolant loss and possible engine damage from overheating. When you replace your surge tank pressure cap, GM a cap is recommended. I' You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol, and it will burn if the engine parts arehot enough. Don't spill coolant on a hot engine. When replacing the pressure cap, make sureis tight. it Thermostat Engine coolant temperature is controlled a thermostat by in the engine coolant system. thermostat stops the The flow of coolant through the radiator until the coolant reaches a preset temperature. When you replace your thermostat, an ACDelco thermostat is recommended.