When temperatures rise, most drivers think about air conditioning and tyre pressures, but engine coolant plays an equally important role in keeping vehicles running reliably throughout the summer months.

Modern coolants are essential for maintaining performance and avoiding costly downtime. Here are some of the most common questions asked about coolants.

What does engine coolant actually do?

Engine coolant regulates engine temperature by transferring heat away from critical components and through the radiator, where it can safely dissipate.

While often associated with winter freeze protection, the role of coolants are just as important during summer. Without effective cooling, engines can quickly overheat, particularly under heavy loads, in stop-start traffic or during long-distance journeys.

Coolants also help protect against corrosion, lubricate components such as the water pump and help prevent scale and deposit formation within the cooling system.

Why is summer particularly demanding on cooling systems?

Higher ambient temperatures naturally place additional strain on the engine cooling system. Vehicles operating under heavy load conditions, such as towing or construction work, generate even more heat.

Inadequate coolant protection can result in overheating, reduced efficiency, increased wear and, in severe cases, engine damage and unplanned downtime. For commercial operators, overheating can also mean costly vehicle off-road time and disrupted schedules.

Does coolant degrade over time?

Yes. Over time, coolant additives lose effectiveness, reducing their ability to protect against corrosion, cavitation and deposits. Contaminated or ageing coolant may also lose its heat transfer efficiency, placing additional stress on the cooling system. This is why regular coolant inspection and replacement is essential as part of a preventative maintenance schedule.

What should operators and workshops check during summer?

Cooling systems should be inspected regularly for:
 

• Correct coolant level
• Signs of leaks or contamination
• Hose and clamp condition
• Radiator cleanliness and airflow restriction
• Correct coolant specification and concentration

Using the correct coolant recommended by the vehicle manufacturer is critical, as modern engines often require specific formulations to ensure compatibility and long-term protection.

Fortunately, Texaco Lubricants is here to help. The Texaco EGX antifreeze/ coolant is designed to support a range of industrial, professional and automotive applications. To find out more about the product and its benefits, visit the EGX Antifreeze/Coolant page.