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
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.
To effectively diagnose a coolant leak in your 2018 Ford Explorer, start with a thorough visual inspection under the hood and beneath the vehicle. Look for any visible signs of coolant, such as puddles or white residue around critical components like hoses, the radiator, and the water pump. If you don’t spot any obvious leaks, proceed to perform a pressure test on the cooling system, which can help pinpoint hidden leaks by pressurizing the system with a specialized tool. Next, inspect the radiator cap for any signs of wear or damage, as a faulty cap can lead to leaks. Pay close attention to all hoses connected to the cooling system, checking for cracks or bulges, particularly at the connections where leaks are most likely to occur. Additionally, examine the water pump for any signs of corrosion or leaks, as this component is crucial for maintaining proper coolant circulation. Don’t forget to check the heater core, as leaks here can result in coolant entering the vehicle's interior. Finally, monitor the coolant level in the reservoir; a sudden drop may indicate a leak that needs immediate attention. By following this diagnostic approach, you can systematically identify and address any coolant leaks, ensuring your vehicle remains in optimal condition.
When dealing with coolant leaks in a 2018 Ford Explorer, it's essential to understand the common problems that may arise. One of the primary culprits is damaged hoses, which can deteriorate over time due to heat and pressure, leading to leaks. Additionally, a faulty radiator can be a significant source of coolant loss; cracks or damage in the radiator can allow coolant to escape. Another area to inspect is the water pump, as leaks from this component can occur at the front of the engine, often indicating a need for replacement. Don't overlook the radiator cap, as a malfunctioning cap can fail to maintain proper pressure, resulting in coolant leaks. Furthermore, corrosion in the heater core can lead to leaks inside the vehicle, which may not be immediately visible. Lastly, ensure that the clamps securing the hoses are tight and undamaged, as loose or broken clamps can also contribute to coolant loss. By being aware of these common issues, DIYers can take proactive steps to diagnose and address coolant leaks, helping to maintain the health of their Ford Explorer.
Addressing a coolant leak in a 2018 Ford Explorer is of utmost urgency due to the critical role coolant plays in maintaining engine temperature. When coolant leaks occur, they can lead to a rapid decrease in coolant levels, which significantly increases the risk of engine overheating. Overheating can cause severe damage to engine components, potentially resulting in costly repairs or even complete engine failure. Moreover, neglecting a coolant leak can exacerbate the problem, leading to further damage to essential cooling system parts like the radiator and water pump. This not only compromises the vehicle's performance but also poses safety risks while driving. Therefore, it is essential to promptly identify and repair any coolant leaks to ensure the vehicle operates safely and efficiently, ultimately saving time and money in the long run.
Read about related problems experienced by other Ford Explorer drivers like you.
See what others are asking about their Ford Explorer. Get answers from RepairPal's community of auto experts and enthusiasts.
