How to Solve the High Water Temperature Issue in Peugeot 307?

[LeJeremiah]

For a Peugeot 307 with high water temperature, you can check the coolant level and ensure the fan is functioning properly. Here are some relevant details: 1. Normal Water Temperature Range: The engine water temperature is generally normal around 90 degrees Celsius. In summer, due to higher air temperatures and increased engine load when climbing slopes, the engine water temperature exceeding 100 degrees Celsius is normal. For the Peugeot 307, the electric fan starts at low speed when the temperature reaches 97 degrees Celsius and at high speed at 108 degrees Celsius. As long as the electric fan starts normally when the engine water temperature reaches 100 degrees Celsius, there will be no issues. Additionally, the boiling point of automotive coolant is typically around 135 degrees Celsius, so the coolant will not boil at 100 degrees Celsius. 2. Precautions When Handling: After the radiator water boils, there is internal pressure. Do not immediately open the radiator filler cap, as hot water may spray out and cause burns. When the engine temperature is too high, do not pour cold water on the engine, as this can have severe consequences, potentially causing the engine block to crack due to sudden cooling.

[LaJoseph]

Last time I was driving my Peugeot 307, the water temperature suddenly rose, which gave me a scare. I quickly pulled over, turned off the engine, and checked. I found the coolant reservoir level was low, so I added some pure water as an emergency measure. However, the fan didn't kick in. Later, at the repair shop, it was diagnosed as a faulty fan relay. The mechanic said it's a common issue with this model and fixed it by replacing the part. High water temperature needs careful attention because it can damage engine components, such as warping the cylinder head, which would incur high repair costs. Regularly check the fluid level, use genuine coolant without mixing, and clean the radiator fins to prevent dust blockage. Pay extra attention to the dashboard during summer traffic jams.

[GemmaMarie]

Peugeot 307 Running Hot? Don’t Rush to Repair—Try These DIY Checks First. Simple steps: Pop the hood and check if the coolant level is between MIN and MAX. Top up with coolant or distilled water if low. Feel the upper radiator hose—if it’s not hot, the thermostat might be stuck. Start the engine and listen for the cooling fan—no sound could mean a faulty switch. Also, inspect for coolant leaks or unusual pump noises. Regular radiator cleaning during maintenance prevents clogs, saving money and hassle. If overheating persists, visit a professional shop to avoid major damage like engine failure—safety always comes first.

[StFrank]

High Water Temperature Immediate Action: Stop the engine and check the coolant level. If it's low, top it up but avoid opening the cap when hot to prevent burns. Common causes include a faulty thermostat stuck closed, a failed coolant pump, or a radiator fan malfunction such as relay issues. In emergencies, turn the heater to max and blow air to cool down and buy time. Older Peugeot 307 models are prone to such issues; seek professional repair promptly to prevent engine damage like cylinder block cracks, which can increase maintenance costs.