Top Maintenance Tips for Second-Hand Trucks in Hot Climates

Used trucks exported from the UK are engineered to high standards, built to endure heavy use and long distances. However, even the toughest vehicles face unique challenges when they are used in hot, dry and dusty conditions like those commonly found in parts of Africa. Whether you’re running a logistics business in Botswana or managing a fleet in Kenya, proper maintenance is essential to getting the best from your investment. With the right care and regular servicing, your vehicle can deliver strong, reliable performance for years to come. 

At GRC Trucks, we understand environments and the stresses they can place on second-hand trucks, and so this blog contains expert advice to help you care for your vehicle in demanding environments. 

Cooling System

Perhaps the most critical system in any truck operating in a hot climate is the cooling system. Excessive heat can quickly lead to engine overheating, breakdowns and, in severe cases, permanent damage. 

Make it a habit to frequently check coolant levels and top up using the correct coolant-to-water ratio which has been recommended by the manufacturer. In hotter regions, it’s often wise to flush the entire system more regularly (about once every 12 to 18 months) to remove old coolant and any sediment built up in the radiator or hoses. 

You should also inspect the radiator itself for signs of corrosion, leaks or blockages, especially if you’re driving on dusty or unpaved roads where debris can accumulate. Keep an eye on the temperature gauge and never ignore signs of overheating. Prevention is far cheaper than a new engine. 

Tyres

High temperatures have a direct impact on the performance of tyres. Heat causes air inside the tyres to expand, which can lead to overinflation and uneven wear. Even worse, it can lead to blowouts. Rubber compounds degrade more quickly in hot weather, particularly when tyres are exposed to UV rays or abrasive surfaces. 

To avoid tyre issues, check the pressure on a weekly basis, and always follow manufacturer specifications for inflation. Rotate tyres regularly to encourage even wear. Consider fitting heat-resistant or region-specific tyres designed to withstand higher surface temperatures. Don’t forget to inspect for cracks, tread separation or unusual wear patterns, all of which can be signs that your tyres are struggling with the heat. 

Engine Oil

Engine oil doesn’t last as long as in hot climates as it does in cooler climates. High ambient temperatures accelerate oil breakdown, which then loses the ability to effectively lubricate, clean and cool your engine. This is particularly important in stop-start urban conditions or during long-haul driving with heavy loads. 

To protect your engine, use oil that’s specifically formulated for high-temperature performance. Check for viscosity ratings suited to your climate, and stick closely to the manufacturer’s recommended service intervals (or consider reducing the time between oil changes if you’re operating in extreme heat or dusty conditions). Regular checks of oil colour and level will help you spot early signs of degradation or contamination. 

Battery

Failure of the battery is a common issue in hot climates. While most people might associate battery problems with cold weather, heat is actually more damaging over time. High temperatures cause the fluid inside batteries to evaporate, which shortens their lifespan and reduces starting power. 

Your battery should be securely mounted and the terminals should be clean and corrosion-free. Have the battery’s voltage and charging capacity tested periodically, especially if it’s more than a couple of years old. In older-style batteries, topping up with distilled water may still be required, but you should always follow safety advice when working around batteries. 

Air Filtration

Dusty environments are a major concern for trucks, particularly on unpaved roads or desert terrain. Dust quickly clogs air filters, which restricts airflow to the engine, increases fuel consumption and reduces power. 

Inspect and clean the air filter frequently – possibly every few weeks depending on your location and operating conditions. Replacing the filter on a regular basis is an essential step in maintaining engine health. If you operate in particularly harsh or sandy areas, upgrade to heavy-duty filters that are designed to trap finer particles. 

Brakes

Driving in hot weather, especially with heavy loads or on hilly terrain, puts additional pressure on your braking system. Brake fade (the loss of braking power due to overheated components) is a real risk in these conditions. 

Regular inspection of brake pads, discs and fluid is essential. Make sure that the pads are not worn down and that the discs are free from scoring or warping. Brake fluid should be topped up as-and-when required, and checked for moisture content which can compromise braking performance in extreme heat. 

Adopt sensible driving habits too. Relying less on continuous braking and using engine braking on descents can help preserve your brake system. 

Suspension and Moving Parts

Heat not only affects fluids. It also dries out grease used on joints, bearings and suspension parts. Once lubrication breaks down, metal components start to wear faster, which leads to part replacements and/or costly repairs. 

Regular greasing of key moving parts is a must, especially on vehicles that travel long distances over rough or dusty roads. Use high-temperature grease suited for your location, and pay attention to any unusual noises or changes in handling which might indicate worn suspension components. 

Cab and Interior

It’s easy to overlook interior care, but consistent exposure to high heat and sunlight can damage electronics, dashboards and even the upholstery over time. Cracked dashboards, faded plastics and hot, uncomfortable cabs are all signs of sun damage. 

When parking, pick shaded areas whenever possible. Use sunshades or dashboard covers to protect interior surfaces, and consider fitting window visors or light tints to reduce glare and UV exposure. If your truck is regularly exposed to extreme heat, invest in seat covers to help preserve the original upholstery. 

Maintenance Schedule

One of the best ways to avoid costly breakdowns and extend the lifespan of your truck is to be proactive and follow a structured maintenance plan, allowing you to catch small issues before they become major failures. 

Create a simple schedule that includes daily checks (fluids, lights and tyres), weekly inspections (coolant, battery, filter cleaning) and monthly or mileage-based servicing (oil changes, brake checks, greasing). Keeping a log of everything will help to track what’s been done and when – especially useful for fleet managers. 

If you’re working in a region with skilled local mechanics, build relationships with them. Their knowledge of local conditions and terrain will be invaluable when it comes to diagnosing problems and preventing them. 

With regular attention and smart maintenance habits, second-hand UK trucks can perform well and thrive – even in the most demanding climates. Applying the used truck care strategies, we’ve talked about in this blog will help protect your operation.  

At GRC Trucks, we support our customers – not just by supplying high-quality vehicles, but with the expert guidance they need to succeed in challenging environments. If you’re looking for a truck that’s built to last and backed by expert export advice, browse our website or contact us now to discuss!