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Hot Weather, Hot Problems: Eight Costly Truck Failures to Watch for in the Heat

| June 6, 2025 | By
When summer temperatures spike, so do the risks of costly truck breakdowns. Extreme heat puts added stress on every system in a heavy-duty truck, and if maintenance isn't up to par, the result can be downtime and unexpected repairs. Here's a breakdown of the eight most common heat-related truck failures and how to stay ahead of them.

  1. Engine Overheating
    Nothing halts a haul like an overheated engine. Low coolant, a bad thermostat, or a failing water pump can cause temperatures to rise fast. Keep the cooling system inspected and fluids topped off.

  2. Tire Blowouts
    Hot roads and high temperatures increase air pressure inside tires, raising the risk of blowouts and tread separation. Regular pressure checks and tire inspections are a must during the summer months.

  3. Battery Failure
    Heat accelerates fluid evaporation and corrosion at the terminals. A weakened battery may not show symptoms until it fails. Summer is a good time for a battery load test.

  4. Fuel System Issues
    High heat causes fuel to evaporate more quickly, hurting fuel economy and stressing the fuel system. Watch for leaks and performance issues.

  5. Oil Breakdown
    Heat thins out engine oil, reducing its ability to lubricate moving parts. Stick to recommended service intervals and consider an oil analysis to catch problems early.

  6. Cooling System Stress
    Your radiator, coolant, hoses, and fans all work harder in hot weather. Any weak link here can lead to major trouble fast. Remember to have the system inspected thoroughly.

  7. A/C System Failures
    Nobody wants to be stuck in the cab without A/C in the dead of summer. Leaks, low refrigerant, or a failing compressor can knock the system out right when it's needed most.

  8. Aftertreatment System Issues
    Extreme heat can throw off the delicate balance of modern emissions systems. 

From Diesel Particulate Filter (DPF) regeneration to Selective Catalytic Reduction (SCR) system performance, heat impacts:

  • DPF Regeneration: Needs high temps to burn soot, but too much heat can trigger uncontrolled regen or component damage.

  • SCR System: Excess heat can break down diesel exhaust fluid (DEF).

  • Diesel Oxidation Catalyst (DOC) and Thermal Stress: Thermal cycling leads to stress cracks and component fatigue.

  • Coolant Leaks: Heat increases pressure in coolant systems, risking leaks that affect aftertreatment components.

The Fix: Preventive Maintenance + Diesel Force™

To beat the heat, the Cleveland Brothers RIG360 service team recommends regular preventative maintenance service and the Diesel Force™ Maintenance Program, a system that’s built specifically for modern diesel engines and emissions systems. It deep-cleans the exhaust gas recirculation (EGR) circuit, oil, and fuel systems, reducing DPF regens and helping your truck run cooler and cleaner.

Don’t wait until it’s too late. Schedule summer maintenance today, Call 866-311-8589.


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