2012 Chevrolet Corvette Owner's Manual - Page 304

10-28 Vehicle Care How to Add Coolant to the Coolant Surge Tank Checking Coolant The vehicle must be on a level surface when checking the coolant level. Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. If coolant is visible but the coolant level is not at or above the FULL COLD mark, add a 50/50 mixture of clean, drinkable water and DEX-COOL coolant at the coolant recovery tank, but be sure the cooling system is cool before this is done. See Engine Coolant on page 10‑26 for more information. The engine coolant surge tank is located toward the rear of the engine compartment on the driver side of the vehicle. See Engine Compartment Overview on page 10‑8 for more information on location. When the engine is cold, the coolant level should be at the FULL COLD mark on the coolant surge tank. When the engine is hot, the level could be higher than the FULL COLD line. If the coolant is below the FULL COLD line when the engine is hot, there could be a leak in the cooling system. If the coolant is low, add the coolant or take the vehicle to a dealer for service. { WARNING 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. Do not spill coolant on a hot engine. { WARNING Steam and scalding liquids from a hot cooling system can blow out and burn you badly. They are under pressure, and if you turn the coolant surge tank pressure cap - even a little - they can come out at high speed. (Continued)