2012 Buick Regal Owner Manual - Page 294

10-20 Vehicle Care center, familiar with legal requirements regarding used coolant disposal. This will help protect the environment and your health. Be sure the cooling system is cool before this is done. If no coolant is visible in the coolant surge tank, add coolant as follows: These mixtures: . Give freezing protection down to −37°C (−34°F), outside temperature. Give boiling protection up to 129°C (265°F), engine temperature. Protect against rust and corrosion. Will not damage aluminum parts. Help keep the proper engine temperature. . 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 mark pointed to, add: 2.0L Engine and 2.4L Engine without eAssist A 50/50 mixture of clean drinkable water and DEX-COOL coolant. 2.4L Engine with eAssist A 50/50 mixture of deionized water and DEX-COOL coolant. How to Add Coolant to the Coolant Surge Tank Notice: This vehicle has a specific coolant fill procedure. Failure to follow this procedure could cause the engine to overheat and be severely damaged. If no problem is found, check to see if coolant is visible in the coolant surge tank. If coolant is visible but the coolant level is not at the indicated level mark, add a 50/50 mixture of clean, drinkable or deionized water and DEX-COOL coolant at the coolant surge tank, but be sure the cooling system, including the coolant surge tank pressure cap, is cool before you do it. . . . Notice: If an improper coolant mixture is used, the engine could overheat and be badly damaged. The repair cost would not be covered by the vehicle warranty. Too much water in the mixture can freeze and crack the engine, radiator, heater core, and other parts. Never dispose of engine coolant by putting it in the trash, pouring it on the ground, or into sewers, streams, or bodies of water. Have the coolant changed by an authorized service