2012 Acura RDX Owner's Manual - Page 470

If the Engine Overheats 5. Look for any obvious coolant leaks, such as a split radiator hose. Everything is still extremely hot, so use caution. If you find a leak, it must be repaired before you continue driving (see Emergency Towing on page 475). 6. If you do not find an obvious leak, check the coolant level in the radiator reserve tank. Add coolant if the level is below the MIN mark. 7. If there was no coolant in the reserve tank, you may need to add coolant to the radiator. Let the engine cool down until the reading reaches the middle of the temperature gauge or lower before checking the radiator. 9. Start the engine, and set the temperature to maximum heat (climate control to AUTO at '' ''). Add coolant to the radiator up to the base of the filler neck. If you do not have the proper coolant mixture available, you can add plain water. Remember to have the cooling system drained and refilled with the proper mixture as soon as you can. 10. Put the radiator cap back on tightly. Run the engine, and watch the temperature gauge. If it goes back to the H mark, the engine needs repair (see Emergency Towing on page 475). 11. If the temperature stays normal, check the coolant level in the radiator reserve tank. If it has gone down, add coolant to the MAX mark. Put the cap back on tightly. Removing the radiator cap while the engine is hot can cause the coolant to spray out, seriously scalding you. Always let the engine and radiator cool down before removing the radiator cap. 8. Using gloves or a large heavy cloth, turn the radiator cap counterclockwise, without pushing down, to the first stop. After the pressure releases, push down on the cap, and turn it until it comes off. 464