2012 Chevrolet Corvette Owner's Manual - Page 302

10-26 Vehicle Care Checking Coolant 4. Tighten the bleeder valve if there is coolant flowing out of the bleeder valve. 5. If there is no coolant flowing out of the bleeder valve, there could be a leak in the system. Tighten the bleeder valve and contact the dealer for service. Cooling System (Intercooler) The 6.2L LS9 supercharged V8 engine has an intercooler cooling system. See Engine Compartment Overview on page 10‑8 for location of the intercooler. The intercooler cooling system has a special procedure for draining and adding coolant. Because this procedure is difficult, see the dealer for service if the intercooler is low on coolant. The procedure can also be found in the service manual. To purchase a service manual, see Service Publications Ordering Information on page 13‑18. Engine Coolant 1. Verify that the engine and intercooler are no longer hot. 2. Place a cloth to absorb possible coolant loss under the driver's side bleeder valve (A). 3. Loosen, but do not completely unscrew the bleeder valve to check for coolant in the system. The cooling system in the vehicle is filled with DEX-COOL® engine coolant. This coolant is designed to remain in the vehicle for 5 years or 240 000 km (150,000 mi), whichever occurs first. The following explains the cooling system and how to check and add coolant when it is low. If there is a problem with engine overheating, see Engine Overheating on page 10‑30.