Chevrolet Bolt EV Is Overheating

Common Causes of Overheating in Your Chevrolet Bolt EV and How to Prevent Engine Damage

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Reviewed by
Bo Fader
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 Chevrolet Bolt EV 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.

Troubleshooting Overheating Issues in a Chevrolet Bolt EV

When troubleshooting overheating issues in your Chevrolet Bolt EV, begin by checking for visible signs of coolant leaks, as these are often the simplest problems to identify and fix. Inspect the water pump, radiator, and hoses for any signs of damage or leakage. If you notice any coolant loss, replenishing the fluid may resolve the issue. Next, assess the functionality of the radiator fan and thermostat; a malfunctioning fan can prevent proper cooling, while a faulty thermostat may not regulate temperature effectively. If the engine overheats and steam is visible, prioritize safety by turning off the vehicle and allowing it to cool before further inspection. In cases where the temperature rises without steam, it’s wise to consult an EV technician who can conduct a thorough diagnostic assessment. Additionally, be aware of the potential risks associated with battery defects, particularly in older models, as overheating can lead to serious safety hazards. By following this diagnostic approach, you can systematically address overheating concerns and maintain the performance and safety of your Chevrolet Bolt EV.

What to Do When Your Chevrolet Bolt EV is Overheating?

When your Chevrolet Bolt EV experiences overheating, understanding the common problems that can lead to this situation is essential for effective DIY troubleshooting. One of the primary culprits is a coolant leak, which can stem from various components such as the water pump, radiator, or hoses. Additionally, issues with the radiator fan or a malfunctioning thermostat can contribute to overheating. It's crucial to recognize the symptoms early, such as warning lights or steam from the hood, and take immediate action to prevent further damage. Regular maintenance, including using high-quality coolant and adhering to recommended change intervals, can significantly reduce the risk of overheating. For those planning long trips, preemptively warming the battery by plugging in the vehicle can help manage temperatures. Moreover, be aware of the specific risks associated with battery overheating, particularly in 2017–2019 models, which may have manufacturing defects. Lastly, during hot weather, keeping your Bolt EV plugged in while parked can activate the battery cooling system, helping to mitigate overheating risks. By being informed about these common problems and taking proactive measures, you can maintain the performance and safety of your Chevrolet Bolt EV.

What to Do When Your Chevrolet Bolt EV is Overheating?

When your Chevrolet Bolt EV shows signs of overheating, it’s crucial to act swiftly to prevent serious damage and ensure your safety. Overheating can lead to significant mechanical failures, including engine damage or battery issues, which can be costly to repair. Ignoring symptoms such as rising temperature gauges or unusual smells can escalate into more severe problems, including the risk of fire, particularly in the 2017–2019 models that have known vulnerabilities. Regular maintenance, such as changing the coolant every 30,000 miles or two years, is essential to keep your vehicle running smoothly. Additionally, if you notice any leaks or suspect a malfunctioning radiator fan or thermostat, it’s vital to diagnose these issues promptly. Charging your Bolt EV in extreme temperatures can also exacerbate overheating, so utilizing the GM dual voltage EVSE charging cable and ensuring proper battery cooling is advisable. By staying vigilant and addressing overheating symptoms immediately, you can protect your vehicle and ensure a safer driving experience.

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