2018 Kia Soul Is Overheating

Common Causes of Overheating in Your 2018 Kia Soul and How to Resolve Them Effectively

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
24% chance it's the
Thermostat
0%
41% chance it's the
Coolant leak (water pump, radiator, hose etc.)
0%
32% chance it's the
Radiator Fan
0%
3% chance it's
Something else
The most common reasons a 2018 Kia Soul is overheating are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat.
  • Thermostat: A faulty thermostat can cause the engine to overheat or run too cool by failing to regulate the flow of coolant properly.
  • Coolant leak (water pump, radiator, hose etc.): A coolant leak can occur due to a damaged hose, a failing water pump, or a compromised radiator, leading to loss of coolant and potential engine overheating.
  • Radiator Fan: A faulty radiator fan can lead to engine overheating due to insufficient airflow over the radiator.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial diagnostic steps to take for a 2018 Kia Soul that is overheating?

When faced with an overheating 2018 Kia Soul, it's essential to adopt a systematic diagnostic approach to identify the root cause effectively. Start by checking the coolant level in both the radiator and the reservoir, as insufficient coolant can lead to overheating. If the coolant is low, refill it and monitor for any leaks in the cooling system, including hoses, the radiator, and the water pump, as these can significantly impact coolant levels. Next, inspect the radiator cap for any signs of wear or damage, since a faulty cap can disrupt the pressure needed for proper cooling. Ensure that the cooling fans are operational, as they play a crucial role in maintaining airflow through the radiator. Additionally, test the thermostat to confirm it opens and closes at the correct temperatures; a malfunction here can restrict coolant flow and contribute to overheating. Finally, examine the water pump for any leaks or signs of failure, as a compromised pump can hinder coolant circulation. By following these steps, you can effectively diagnose and address the overheating issue in your Kia Soul, potentially saving time and repair costs.

What are the common causes of overheating in a 2018 Kia Soul?

Understanding the common causes of overheating in a 2018 Kia Soul is crucial for any DIY enthusiast looking to maintain their vehicle's performance. One of the primary culprits is low coolant levels, which can occur due to evaporation or leaks, making it essential to regularly check and top off the coolant to ensure efficient engine temperature regulation. Additionally, cooling system leaks can arise from damaged hoses, a faulty water pump, or a compromised radiator, all of which can lead to significant coolant loss and subsequent overheating. Another critical factor is the thermostat; if it fails to open or close properly, it can disrupt the coolant flow, causing the engine to overheat. Radiator issues, such as clogs or physical damage, can also hinder the cooling process, while problems with the cooling fan, including a malfunctioning motor or relay, can prevent adequate airflow through the radiator. By being aware of these common issues and conducting regular checks, DIYers can take proactive steps to prevent overheating and ensure their Kia Soul runs smoothly.

How urgent is it to address the overheating issue in a 2018 Kia Soul?

Addressing the overheating issue in your 2018 Kia Soul is crucial and should be treated with the utmost urgency. Overheating can lead to severe engine damage, which may result in costly repairs or even complete engine failure if left unattended. The longer you ignore the symptoms of overheating, the more likely you are to face significant complications that could jeopardize the vehicle's performance and safety. Regular maintenance and immediate attention to any signs of overheating not only help in preventing major issues but also extend the lifespan of your vehicle. Therefore, if you notice your Kia Soul running hotter than usual, it is essential to take action right away to avoid the risk of serious damage and ensure your vehicle remains reliable on the road.

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2018 Kia Soul Overheating: Causes & Repair Costs | RepairPal