INFINITI G35 Is Overheating

Common Causes of Overheating in Your INFINITI G35 and How to Resolve Them Effectively

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Reviewed by
Devin Cabugcal
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 INFINITI G35 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 an INFINITI G35

When tackling overheating issues in your INFINITI G35, begin by inspecting the simplest components first. Start with the radiator fan; ensure it operates correctly, particularly when the vehicle is idling, as a malfunctioning fan can significantly elevate engine temperatures. Next, check for any visible coolant leaks around the water pump, radiator, and hoses, as these can lead to insufficient coolant levels and overheating. If no leaks are found, focus on the thermostat; a broken thermostat can prevent coolant from circulating properly. Additionally, it’s crucial to bleed the cooling system thoroughly to eliminate any air pockets that may cause overheating. If the problem persists after these checks, consider re-bleeding the system while running the heater to help release trapped air. By systematically addressing these common causes, you can effectively diagnose and resolve overheating issues, ensuring your G35 runs smoothly and efficiently.

What to Check When Your INFINITI G35 is Overheating?

When your INFINITI G35 is overheating, it's crucial to identify and address common problems that may be causing the issue. Begin by examining the radiator fan; if the passenger side fan activates unexpectedly, it could signal a thermostat malfunction. Next, check the thermostat itself, as a faulty unit can disrupt coolant circulation, which is noticeable if the upper radiator hose is hot while the lower one remains cold. Regularly monitor the coolant level in the reservoir, as a drop or visible leaks can indicate a coolant system failure. Additionally, inspect for coolant leaks around the water pump, radiator, and hoses, as these can significantly affect engine temperature. Ensure the radiator fins are clean and free from debris to maintain optimal airflow, as clogged fins can hinder cooling efficiency. While the engine is running, feel the hoses; the top hose should be pressurized, while the bottom should remain firm and not collapsed, indicating proper flow. Lastly, if the heater system is not producing adequate heat, it may also contribute to overheating issues. By systematically checking these components, you can effectively diagnose and resolve overheating in your INFINITI G35.

What to Do When Your INFINITI G35 is Overheating?

When your INFINITI G35 begins to overheat, it’s crucial to act swiftly to prevent further damage to your vehicle. Overheating can lead to severe engine problems, including warped cylinder heads or a blown head gasket, which can be costly to repair. Start by checking for common causes such as a malfunctioning thermostat, coolant leaks, or issues with the radiator fan. These components are vital for maintaining optimal engine temperature, and any failure can escalate the overheating problem. Additionally, ensure that your cooling system is properly bled of air, as trapped air can hinder coolant circulation. Inspect for any visible coolant leaks around the water pump, radiator, and hoses, as these can significantly impact your vehicle's ability to cool effectively. Don’t overlook the functionality of the radiator fan; a non-operational fan can quickly lead to overheating, especially in stop-and-go traffic. Lastly, be cautious with the radiator fins; bent fins can obstruct airflow and exacerbate overheating issues. By addressing these concerns promptly, you can safeguard your INFINITI G35 from serious damage and ensure it continues to perform reliably.

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