Start by checking the coolant level — a reduced level can point to a hidden breach, but it might also stem from a compromised core. Look for puddles under the vehicle, especially after sitting overnight. Coolant often appears as vivid green, neon pink, or vivid orange, making slight stains quick to identify. These drips may come from a loose clamp.

Examine the radiator for hidden damage. Despite the absence of exterior leaks, mineral buildup inside the cooling passages can block coolant movement. Over time, sediment from old coolant combined with corrosion from metal parts can obstruct the cooling matrix, reducing efficiency and elevating operating temperatures.

A professional thermal imaging scan can identify localized overheating that indicate internal blockages — undetectable during visual inspection.

A key red flag is the presence of oil in the coolant or fluid crossover in the oil reservoir. This strongly suggests a compromised engine seal, which can strain radiator components. Should you see a creamy, frothy residue on the dipstick, it’s a sign to act immediately. Visually, the radiator seems undamaged but may be failing under pressure due to an upstream engine problem.

Contemporary SUV models typically include smart fan systems and coolant sensors that communicate with the engine control unit. A malfunctioning probe may deliver false readings, causing you to misdiagnose the cooling system. Run an onboard computer check to pull trouble codes related to coolant temperature. Codes like P0117 or P0118 point to coolant temperature sensor issues, while DTC P0480 relates to fan circuit failure.

Also consider the age and condition of the coolant. Vehicle makers advise a coolant flush every 50,000 to 100,000 km. Degraded fluid depletes its corrosion inhibitors and becomes corrosive, which can erode radiator tubing, leading to hard-to-detect leaks.

If you’re unsure, a cooling system pressure check can locate internal failures. A technician will simulate operating pressure to mimic real-world conditions and find compromised junctions. This is highly recommended for pinpointing non-visible faults that remain hidden without pressure testing.

Lastly, don’t ignore the water pump or thermostat. These components collaborate to regulate engine heat. A stuck thermostat can prevent proper coolant circulation, causing the radiator لوازم یدکی تیگو 7 پرو to overwork. Swapping the temperature valve is a simple and inexpensive fix that can prevent unnecessary radiator replacement.

Identifying cooling system failures in modern SUVs requires a combination of visual checks, electronic diagnostics, and system knowledge. Proactive care and timely responses to early warning signs can avoid catastrophic overheating and keep your SUV running smoothly for years to come.