Carrying heavy loads can put tremendous stress on your car, and the radiator needs to work more to keep your car cool. Stick to the manufacturer’s recommendation for maximum load for your vehicle.
Flush your radiator regularly - once a year or at least every 30,000Kilometres. This helps remove residue, rust, or any build-up inside your radiator.
Look out for any cracks or leaks on the radiator hose, and ensure that the gasket on your radiator cap is affixed well. Maintain the optimum levels of coolant in your car.