Summer is a time when the strain on vehicles increases, as hot weather can cause the engine to overheat, which can have serious consequences. Fixing the consequences of overheating can be expensive, including engine replacement or major repairs.

To avoid overheating problems, keep their vehicles running efficiently, and minimise repair costs, companies with fleets take a number of maintenance measures. We will discuss what these measures are and why engine overheating is dangerous in this article.

Key maintenance activities for vehicles in the summer

The cooling system. Insufficient coolant level is the most common cause of overheating. It is important to make sure that the coolant level is correct and that there are no leaks in the cooling system and that the radiator is clean. If necessary, the cooling system is flushed.

The thermostat, water pump and fan are also checked.

The engine oil and filters. Oil not only lubricates the engine but also helps to cool it. High temperatures can affect the viscosity of the oil, therefore, a check is carried out its level and condition. If the oil level is too low, the engine can overheat.

A dirty air filter can reduce engine power and cause the engine to overheat.  A clogged or faulty fuel filter increases the load on the fuel pump and leads to its breakdown.

A faulty fuel pump can cause the engine temperature to rise. Because the fuel pump is one of the main elements,  which supplies fuel to the engine.

The brake system and tyre condition. In summer, the braking system is subject to greater stress due to heat and dust. Checked the brake fluid level, the condition of the pads and discs, and the tightness of the system.

Summer temperatures can increase the pressure in tyres, so their pressure and condition are checked. Worn tyres increase the risk of punctures and impair handling.

The battery and electrical system. Heat can have a negative impact on the battery, so its condition, charge and terminals are checked.

The condition of the wiring and electrical appliances is also checked.

The air conditioning system is checked – refrigerant level and compressor condition.

Visual inspection. All important components and assemblies of the vehicle are inspected for leaks, damage and other problems.

The dangers of engine overheating

Overheating can cause serious engine damage, such as cylinder deformation, gasket damage and other critical components.

• An overheated engine does not work as efficiently as usual, which can lead to reduced power output and poorer dynamic performance.
• An overheated engine consumes more fuel.
• An overheating engine can cause a loss of power or even stall the engine while driving, which can lead to an accident.
• In extreme cases, overheating can cause the engine to catch fire, which is also a serious hazard.

Regular inspection and maintenance of fleets in the summer is crucial to maintain vehicle efficiency and reliability and avoid costly repairs.