What causes the Peugeot 308 to overheat?

[KyleMarie]

The reason for the Peugeot 308's high water temperature is that a coolant leak or insufficient coolant can prevent the engine from cooling properly, leading to elevated engine temperature. Additionally, a dirty engine radiator can also cause the engine's water temperature to rise. The radiator has many pores formed by cooling fins, which are prone to accumulating lint, sludge, and other debris, reducing ventilation and diminishing cooling efficiency. Poor radiator cooling leads to insufficient engine cooling, resulting in increased engine water temperature. Extended information: Excessive engine water temperature can cause the engine's cylinder head to warp. This warping can lead to poor sealing, direct damage to the cylinder gasket, and mixing of engine coolant into the oil passages, reducing the lubrication effectiveness of the oil and further damaging various engine components until the engine experiences boiling over.

[StJeffrey]

I've been driving a Peugeot 308 for several years and have encountered the high water temperature issue a few times. The most likely cause is a problem with the cooling system. For example, the coolant level might be too low or leaking—check the fluid level as it's prone to overheating when too low. Fan malfunctions are also common; if the fan isn't spinning, heat dissipation is poor, which could be due to a faulty motor or sensor. Worn-out water pump impellers can lead to poor circulation. Another frequent issue in Peugeots is a stuck thermostat, preventing heat from dissipating. A radiator clogged with debris is another possible cause. If these issues aren't addressed promptly, the engine can suffer severe damage, such as a blown head gasket, which would be costly. Remember to stop the car immediately if the water temperature rises and avoid driving further. Wait for it to cool down before checking or towing it to a repair shop. Regular maintenance of the cooling system, like changing the coolant and cleaning the radiator, can prevent these problems.

[DiMax]

My car is a Peugeot 308, and that time when the water temperature was too high was really scary. It turned out the fan belt was loose, preventing the fan from spinning. Other causes include insufficient coolant—check the radiator and hoses for leaks; a faulty thermostat stopping coolant flow; or a failed water pump disrupting circulation. A dirty radiator can also get clogged easily. In this Peugeot model, a broken radiator cap leaking air can cause unstable pressure leading to overheating. If left unrepaired, engine overheating can cause cylinder scoring or cracking, which is extremely expensive to fix. I had it towed to the repair shop, where replacing the thermostat and belt fixed the issue. It's advisable to glance at the temperature gauge before each drive. If it's high, stop immediately, ventilate to cool down, and don't rush to add coolant—it can spray scalding hot. Regular maintenance of the system can save a lot of trouble.

[AlainaLee]

When driving older cars like the Peugeot 308, overheating is mostly caused by aging/coolant evaporation or leaks. Fan failure to start is also common due to motor or relay issues. Damaged water pump impellers prevent coolant circulation. The thermostat is a wear-prone component that frequently gets stuck on the 308, triggering overheating. Radiator clogging from excessive dirt buildup impairs heat dissipation. Untreated, these problems can lead to engine failure. I make it a habit to check coolant levels and listen for fan operation before driving – early repairs are crucial. Always prioritize professional repairs without delay – safety comes first.