The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.
When the head gasket begins to fail, the engine may have no symptoms at all. They only begin to occur when the leak has reached an engine oil passage, engine coolant passage or the engine cylinder.
When that happens, the engine may be very difficult to start, and run roughly when idling. There may be oil or coolant leaking, and the engine may begin to overheat, or at least run hot. At this point, there may be coolant in the engine oil pan — this will look creamy and lighter in color than the oil. Also, the radiator or engine coolant reservoir may have a gurgling sound, the presence engine oil, or smell of combustion. And the check engine light will come on.
The coolant being burned in the engine will produce white exhaust that smells sweet, like engine coolant. When the head gasket fails completely, the engine will overheat within minutes of starting, will stall and then won't restart.
A failing heater core may cause the car's interior to smell like engine coolant. The smell will become worse when the heater is turned on. The engine may also begin to run hotter until the vehicle is repaired.
The worst-case scenario is the engine overheating, which can cause extensive engine damage.
If the heater core is clogged, the air that blows when the heater is turned on will not be very hot.
Problems with the intake manifold gasket can create the following symptoms:
» LEARN MORE: Intake manifold gasket symptoms
A failing radiator can cause the engine to run hot or overheat. Most radiators are made of metal and plastic. The plastic parts can become brittle and crack over time, causing a leak of coolant (typically green or pink in color). All manufacturers have a recommended service interval for coolant renewal. As the coolant ages, the additives breakdown and being to form solid deposits. These deposits will build up in the passages of the cooling system and will eventually clog components, including the radiator. A leaking or clogged radiator must be replaced. Some automatic transmission cars will also have a transmission cooler integrated into the radiator. Lines going to and from the transmission circulate transmission fluid to help cool the transmission in heavy duty applications such as towing or off-roading. If this integrated cooler fails, it can allow transmission fluid and coolant to mix. This will causing shifting issues in addition to overheating.
A coolant leak may be noted from the hoses. Coolant hoses can be damaged by oil leaks, or age. This will lead to swelling or cracking, it is suggested to replace the hoses before they begin leaking to avoid potential overheating.
The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.
A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.
A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.
» LEARN MORE: Signs of a bad thermostat, and how to fix it
If a vehicle is overheating, a bad thermostat could be the problem, and a damaged thermostat housing is more likely to produce a coolant leak, either from a cracked or warped housing or a failed seal to the engine. The thermostat housing can be made of metal or plastic. And the housing can be a stand-alone part that is separate from the thermostat, or (on later model vehicles) can be integrated with the thermostat and replaced as a single unit.
The two most common signs of a bad pump are leaks and noises.
Leaking water pumps can result in damage to the drive and timing belts, and cause the engine to overheat. A failed water pump can be caused by other problems in the cooling system, such as a bad thermostat, radiator or head gasket.
When troubleshooting coolant leaks in your Ford Freestar, start by identifying the type of fluid leaking from your vehicle. Coolant typically has a sweet smell and comes in various colors, which can help distinguish it from water. Pay attention to symptoms such as engine overheating, which may indicate a radiator leak that could lead to severe engine damage if not addressed promptly. Begin your inspection by looking for visible signs of leaks under the vehicle, particularly after the engine has been running and is hot, as some leaks may only appear under these conditions. Check common culprits like loose hose connections, a damaged radiator, or a malfunctioning water pump. If you suspect a more complex issue, consider using a block tester to detect combustion gases in the cooling system, which can help pinpoint the source of the leak. By methodically assessing these factors, you can effectively diagnose and resolve coolant leaks, ensuring your Ford Freestar remains in good working condition.
When tackling a coolant leak in your Ford Freestar, it's crucial to understand the common problems that can arise within the cooling system. Leaks often stem from worn or damaged hoses, which can crack over time due to heat and pressure. The radiator itself may develop leaks from corrosion or physical damage, while the water pump and thermostat housing are also frequent culprits. Additionally, faulty gaskets can lead to coolant seeping out, especially if the engine has been subjected to overheating. By being aware of these potential issues, you can conduct a thorough inspection and perform a pressure test to accurately locate the source of the leak. Addressing these common problems promptly not only prevents further damage but also ensures your vehicle operates efficiently, saving you from costly repairs down the line.
Addressing a coolant leak in your Ford Freestar is not just a matter of routine maintenance; it is a critical safety concern that demands immediate attention. Ignoring the symptoms of a radiator leak can lead to severe overheating, which may result in catastrophic engine damage, such as a blown head gasket or a cracked engine block. The presence of coolant pooling under your vehicle is a clear indicator that something is amiss, and it should not be overlooked, as it can create hazardous driving conditions and lead to costly repairs down the line. Additionally, while water leaks from the air conditioning system may seem unrelated, they can complicate the overall cooling system performance, further exacerbating the issue. Utilizing a block tester to check for combustion gases is essential for accurately diagnosing the source of the leak, ensuring that you address the root cause rather than just the symptoms. Even minor leaks, which may appear insignificant, can signal deeper problems that, if left unresolved, could escalate into major repairs. Therefore, it is imperative to act swiftly when you notice any signs of coolant leakage to maintain the safety and efficiency of your vehicle on the road.
Read about related problems experienced by other Ford Freestar drivers like you.
See what others are asking about their Ford Freestar. Get answers from RepairPal's community of auto experts and enthusiasts.