Insufficient coolant or leaks – Water pump, radiator, or hose leaks, or failure to replenish coolant, leading to inadequate circulation.
Water pump or thermostat failure – Worn impeller, broken belt, or stuck thermostat preventing proper coolant flow.
Radiator issues – Internal blockage (scale buildup) or external clogging (dust, debris), or faulty fan (not spinning or low speed), reducing cooling efficiency.
Excessive load operation – Prolonged heavy-duty work (e.g., full-load climbing or overloading) generating more heat than the cooling system can handle.
Incomplete combustion – Faulty fuel injectors or incorrect timing, causing incomplete fuel burn and excess heat.
Damaged cylinder head gasket – Coolant leaking into cylinders or mixing with oil ("blown head gasket"), disrupting cooling.
Environmental or coolant factors – High ambient temperatures or degraded/old coolant due to infrequent replacement.
Note: If overheating occurs, avoid shutting off the engine immediately—let it idle to cool down before inspection to prevent cylinder damage
