When you decide it is safe to lift the hood, here is what you will see:

2.4L L4 Engine shown, 3.5L V6 and 3.6L V6 Engines similar

1. Electric Engine Fan

2. Coolant Surge Tank

3. Pressure Cap

Caution: An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.

If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. The vehicle should be parked on a level surface.

The coolant level should be between the MIN and MAX lines. If it is not, you may have a leak at the radiator hoses, heater hoses, radiator, water pump, or somewhere else in the cooling system.

Caution: Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned.

Do not run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle.

If there seems to be no leak, with the engine on, check to see if the electric engine cooling fan is running. If the engine is overheating, the fan should be running. If it is not, your vehicle needs service. Turn off the engine.

Notice: Engine damage from running the engine without coolant is not covered by the warranty.

Notice: Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner, at 30,000 miles (50 000 km) or 24 months, whichever occurs first. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL® (silicate-free) coolant in the vehicle.

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 you have not found a problem yet, check to see if coolant is visible in the surge tank. If coolant is visible but the coolant level is not at between the MIN and MAX lines, add a 50/50 mixture of clean, drinkable 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. See Engine Coolant for more information.

Caution: 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. Never turn the cap when the cooling system, including the coolant surge tank pressure cap, is hot. Wait for the cooling system and coolant surge tank pressure cap to cool if you ever have to turn the pressure cap.

Caution: Adding only plain water to the cooling system can be dangerous. Plain water, or some other liquid such as alcohol, can boil before the proper coolant mixture will. The vehicle's coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, the engine could get too hot but you would not get the overheat warning. The engine could catch fire and you or others could be burned. Use a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant.

Notice: In cold weather, water can freeze and crack the engine, radiator, heater core and other parts. Use the recommended coolant and the proper coolant mixture.

Caution: 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.

1. You can remove the coolant surge tank pressure cap when the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot.

Turn the pressure cap slowly counterclockwise about one-quarter of a turn. If you hear a hiss, wait for that to stop. This will allow any pressure still left to be vented out the discharge hose.

2. Then keep turning the pressure cap slowly, and remove it.



3. Fill the coolant surge tank with the proper DEX-COOL® coolant mixture, to between the MIN and MAX lines.
4. With the coolant surge tank pressure cap off, start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine cooling fan.

By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, add more of the proper DEX-COOL® coolant mixture to the coolant surge tank until the level reaches between the MIN and MAX lines.

5. Then replace the pressure cap. Be sure the pressure cap is hand-tight.

Check the level in the surge tank when the cooling system has cooled down. If the coolant is not at the proper level, repeat Steps 1 through 3 and reinstall the pressure cap. If the coolant still is not at the proper level when the system cools down again, see your dealer/retailer.

When you decide it is safe to lift the hood, here is what you will see:

1. Coolant Surge Tank

2. Pressure Cap

Caution: An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.

If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. The vehicle should be parked on a level surface.

The coolant level should be between the MIN and MAX lines. If it is not, you may have a leak at the radiator hoses, heater hoses, radiator, water pump, or somewhere else in the cooling system.

Caution: Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned.

Do not run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle.

If there seems to be no leak, with the engine on, check to see if the electric engine cooling fan is running. If the engine is overheating, the fan should be running. If it is not, your vehicle needs service. Turn off the engine.

Notice: Engine damage from running the engine without coolant is not covered by the warranty.

Notice: Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner, at 30,000 miles (50 000 km) or 24 months, whichever occurs first. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL® (silicate-free) coolant in the vehicle.

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 you have not found a problem yet, check to see if coolant is visible in the surge tank. If coolant is visible but the coolant level is not at between the MIN and MAX lines, add a 50/50 mixture of clean, drinkable 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. See Engine Coolant for more information.

Caution: 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. Never turn the cap when the cooling system, including the coolant surge tank pressure cap, is hot. Wait for the cooling system and coolant surge tank pressure cap to cool if you ever have to turn the pressure cap.

Caution: Adding only plain water to the cooling system can be dangerous. Plain water, or some other liquid such as alcohol, can boil before the proper coolant mixture will. The vehicle's coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, the engine could get too hot but you would not get the overheat warning. The engine could catch fire and you or others could be burned. Use a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant.

Notice: In cold weather, water can freeze and crack the engine, radiator, heater core and other parts. Use the recommended coolant and the proper coolant mixture.

Caution: 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.

1. You can remove the coolant surge tank pressure cap when the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot.

Turn the pressure cap slowly counterclockwise about one-quarter of a turn. If you hear a hiss, wait for that to stop. This will allow any pressure still left to be vented out the discharge hose.

2. Then keep turning the pressure cap slowly, and remove it.



3. Fill the coolant surge tank with the proper DEX-COOL® coolant mixture, to between the MIN and MAX lines.
4. With the coolant surge tank pressure cap off, start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine cooling fan.

By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, add more of the proper DEX-COOL® coolant mixture to the coolant surge tank until the level reaches between the MIN and MAX lines.

5. Then replace the pressure cap. Be sure the pressure cap is hand-tight.

Check the level in the surge tank when the cooling system has cooled down. If the coolant is not at the proper level, repeat Steps 1 through 3 and reinstall the pressure cap. If the coolant still is not at the proper level when the system cools down again, see your dealer/retailer.

Cooling System Engine

The vehicle engine cooling system uses a 50/50 pre-mixed DEX-COOL® coolant and deionized water available at the dealer/retailer.

When you decide it is safe to lift the hood, here is what you will see:

1. Electric Engine Fans (Not Shown)

2. Coolant Overflow Recovery Bottle and Cap (shown with cap removed)

Caution: An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.

If the coolant inside the coolant overflow recovery bottle is hot, do not do anything else until it cools down. The vehicle should be parked on a level surface.

The coolant level should be above the minimum mark on the ISO symbol inside the coolant overflow recovery bottle. If it is not, there may be a leak at the radiator hoses, heater hoses, radiator, water pump, or somewhere else in the cooling system.

Caution: Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them or burns may result.

Do not run the vehicle if there is an engine coolant leak. If the vehicle is running, it could lose all engine coolant. That could cause an engine fire, and could also cause serious injury. Get any engine coolant leak fixed before driving the vehicle.

If there seems to be no leak, with the engine on, check to see if the electric engine cooling fans are running. If the engine is overheating, the fans should be running. If it is not, the vehicle needs service. Turn off the engine.

Notice: Driving the vehicle when there is no coolant in the coolant overflow recovery bottle, can badly damage the engine. The costly repairs would not be covered by the vehicle warranty.

Notice: Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner, at 30,000 miles (50 000 km) or 24 months, whichever occurs first. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL® (silicate-free) coolant in the vehicle.

How to Add Coolant to the Coolant Overflow Recovery Bottle

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 has been found yet, check to see if coolant is visible in the overflow recovery bottle. If coolant is visible but the coolant level is not between the minimum hot fill and the maximum cold fill lines of the ISO symbols, add a 50/50 mixture of clean, deionized water and DEX-COOL® coolant at the coolant recovery bottle. Be sure the cooling system, including the coolant overflow recovery bottle cap, is cool before you do it. See Engine Coolant for more information.

Caution: There is a pressure cap located on the top radiator hose. It is located between the radiator and the engine under the passenger side engine cover. Removing this pressure cap when coolant is hot can cause serious injury. This pressure cap should only be removed by a qualified technician at the dealer/retailer.

Caution: Coolant from a hot cooling system can cause serious injury. If the coolant overflow recovery bottle cap is turned-even a little-the coolant can come out. Never turn the cap when the cooling system, including the coolant overflow recovery bottle cap, is hot. Wait for the cooling system and coolant overflow recovery bottle cap to cool if the cap ever has to be turned.

Caution: Adding only water to the cooling system can be dangerous. Water, or some other liquid such as alcohol, can boil before the proper coolant mixture. The vehicle coolant warning system is set for the proper coolant mixture. With water or the wrong mixture, the engine could get too hot, but there would be no overheat warning. The engine could catch fire and someone could be burned. Only use a 50/50 mixture of clean, deionized water and DEX-COOL® coolant.

Caution: Coolant can cause serious injury if spilled 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.

The coolant overflow recovery bottle cap can be removed when the cooling system, including the coolant overflow recovery bottle cap and upper radiator hose, is no longer hot.

1. Turn the coolant overflow recovery bottle cap slowly counterclockwise, and remove it.



2. Fill the coolant overflow recovery bottle with the proper DEX-COOL® coolant mixture, to between the minimum hot fill (A) and maximum cold fill (B) lines on the ISO symbol located inside of the coolant overflow recovery bottle.
3. With the coolant overflow recovery bottle cap off, start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine cooling fan.

By this time, the coolant level inside the coolant overflow recovery bottle may be lower. If the level is lower, add more of the proper DEX-COOL® coolant mixture to the coolant overflow recovery bottle until the level reaches between the minimum hot fill and maximum cold fill lines on the ISO symbol inside of the coolant overflow recovery bottle.

4. Then replace the coolant overflow recovery bottle cap. Be sure the pressure cap is hand-tight.

Check the level in the coolant overflow recovery bottle when the cooling system has cooled. If the coolant is not at the proper level, repeat Steps 1 through 3 and reinstall the coolant overflow recovery bottle cap. If the coolant still is not at the proper level when the system cools down again, see your dealer/retailer.

Cooling System Hybrid

In addition to the regular cooling system, the vehicle is also has a cooling system for the hybrid electronics. This cooling system uses a 50/50 pre-mixed DEX-COOL® coolant and deionized water available at the dealer/retailer.

When you decide it is safe to lift the hood, here is what you will see:

1. Hybrid Coolant Surge Tank

2. Hybrid Pressure Cap

Caution: An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.

If the coolant inside the hybrid coolant surge tank is hot, do not do anything else until it cools down.

The coolant level should be at or above the full cold line on the ISO symbol with the vehicle parked on a level surface. If it is not, there may be a leak somewhere in the hybrid cooling system.

The vehicle does not have to be running for coolant to flow in the hybrid system. The hybrid coolant pumps activate as soon as the ignition key is turned to ON/RUN, even with the engine off.

Caution: Radiator hoses, and other hybrid electronics parts, can be very hot. Do not touch them or burns may result.

Do not run the vehicle if there is a hybrid electronics coolant leak. If the vehicle is running, it could lose all the hybrid electronics coolant. That would cause a hybrid electronics failure and the vehicle would shut down. Get any hybrid electronics coolant leak fixed before driving the vehicle.

How to Add Coolant to the Hybrid Coolant Surge Tank

If no problem has been found yet, check to see if coolant is visible in the hybrid coolant surge tank. If coolant is visible but the coolant level is not at or above the minimum line on the ISO symbol, add pre-mixed DEX-COOL (which is a 50/50 mixture of de-ionized water and DEX-COOL) coolant at the hybrid coolant surge tank, but be sure the cooling system, including the hybrid coolant surge tank pressure cap, is cool before you do it. See Hybrid Coolant for more information.

Caution: Coolant from a hot cooling system can cause serious injury. The coolant is under pressure, and if the coolant surge tank pressure cap is turned-even a little-the coolant can come out. Never turn the cap when the cooling system, including the coolant surge tank pressure cap, is hot. Wait for the cooling system and coolant surge tank pressure cap to cool if the pressure cap ever has to be turned.

Notice: Using coolant other than a pre-mixed DEX-COOL, available at your dealer/retailer, may damage your vehicle. Any repairs would not be covered by your warranty. Always use a pre-mixed DEX-COOL (silicate-free) coolant in your vehicle.

The hybrid coolant surge tank pressure cap can be removed when the cooling system, including the coolant surge tank pressure cap and coolant hoses, are no longer hot.

1. Turn the pressure cap slowly counterclockwise about one-quarter of a turn. If you hear a hiss, wait for that to stop. This will allow any pressure still left to be vented out the discharge hose.
2. Then keep turning the pressure cap slowly, and remove it.



3. Fill the hybrid coolant surge tank with the proper DEX-COOL® coolant mixture, to or above the minimum coolant line on the ISO symbol.
4. Then replace the pressure cap. Be sure the pressure cap is hand-tight.

Check the level in the hybrid coolant surge tank when the cooling system has cooled down. If the coolant is not at the proper level, repeat Steps 1 through 3 and reinstall the pressure cap. If the coolant still is not at the proper level when the system cools down again, see your dealer/retailer.