1997 Chevrolet Corvette Owner's Manual - Page 259

NOTICE: If you usean improper coolant mix, your engine could overheat and be badly damaged. The repair cost wouldn't be covered by your warranty. Too much water in the mix can freeze and crackthe engine, radiator, heater core and other parts. If you have to add coolant more than four times a year, have your dealer check your cooling system. Checking Coolant NOTICE: If you usethe proper coolant, you don't have to add extra inhibitors or additives which claimto improve the system. Thesecan be harmful. The coolant surge tank is in the engine compartment behind the headlamp on the passenger's side. 6-24