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.
To effectively diagnose a coolant leak in your 2021 Kia Seltos, start with a thorough visual inspection of the vehicle's undercarriage and engine bay. Look for any visible signs of coolant pooling or staining around the radiator, hoses, and water pump. Next, check the coolant level in both the reservoir and radiator; a significant drop may indicate a leak. If these initial checks do not reveal the issue, consider performing a pressure test on the cooling system, which can help pinpoint leaks by pressurizing the system and observing any pressure drops. Additionally, inspect the radiator cap for damage, as a faulty cap can contribute to leaks. Pay close attention to the hoses and connections, looking for cracks or bulges that could signal wear. Finally, be aware of any sweet smells inside or outside the vehicle, as this can be a telltale sign of leaking coolant. By following this diagnostic approach, you can systematically identify and address any coolant leak issues in your Kia Seltos.
When dealing with coolant leaks in a 2021 Kia Seltos, it's essential to understand the common culprits that may be at play. One of the primary causes is damaged hoses, which can develop cracks or wear over time, leading to leaks in the cooling system. Additionally, a faulty radiator, whether due to corrosion or physical damage, can also be a significant source of coolant loss. Another area to inspect is the radiator cap; if it is loose or damaged, it may not seal properly, allowing coolant to escape. The water pump is another critical component that can leak, often resulting in visible coolant pooling in the engine bay. In more severe cases, a cracked engine block or worn-out gaskets, such as the head gasket, can lead to significant coolant leaks. Identifying these issues early is crucial, as neglecting them can result in overheating and serious engine damage. For DIY enthusiasts, a thorough inspection of these components can help pinpoint the source of the leak and guide you toward the necessary repairs.
Addressing a coolant leak in your 2021 Kia Seltos is not just a matter of routine maintenance; it is an urgent necessity that can prevent severe engine damage and costly repairs. Coolant plays a vital role in regulating engine temperature, and a leak can lead to overheating, which may compromise engine components and ultimately result in engine failure. Ignoring this issue can escalate into a breakdown, leaving you stranded and facing significant repair bills. Additionally, a loss of coolant can hinder the engine's ability to maintain optimal operating temperatures, further exacerbating performance issues and reducing fuel efficiency. Therefore, if you notice any signs of a coolant leak, such as puddles under your vehicle or fluctuating temperature gauges, it is crucial to address the problem immediately to safeguard your vehicle's health and ensure safe driving conditions.
See what others are asking about their Kia Seltos. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other Kia Seltos drivers like you.
