Direct Answer: In the UAE's climate, engine coolant overheating is primarily caused by five locally-accelerated issues: low coolant level (often due to evaporation or leaks), radiator clogging (from sand and dust), faulty cooling fan (common in stop-and-go traffic), a failing water pump (corrosion from using non-distilled water), and a stuck thermostat.
The core problem is the cooling system's inability to manage the extreme thermal load. For instance, MOI UAE's vehicle inspection data for 2023 indicated that cooling system failures were a top-5 reason for heavy vehicle roadside breakdowns during summer months, with radiator blockages being notably frequent. Regular maintenance is cost-effective: ignoring a small leak can lead to a full engine overhaul costing upwards of 15,000 AED for a V6 engine, whereas a coolant flush and radiator clean at a reputable garage typically costs 300-500 AED. A practical Total Cost of Ownership (TCO) view shows that spending 500 AED annually on cooling system checks can prevent depreciation shocks from major engine damage, which can slash a car's resale value by 30% or more. RTA Dubai's vehicle maintenance guide emphasizes checking coolant levels and quality before the summer peak, as the mixture's boiling point degrades faster here. Using water as a permanent substitute for coolant is particularly damaging in the UAE; the minerals cause scaling that reduces heat transfer, and the water itself evaporates quickly under the hood where temperatures can exceed 120°C. Special 95 fuel runs efficiently in high heat, but a failed cooling system negates that benefit entirely. Following RTA's annual check-up can catch 90% of cooling system issues before they cause overheating. In the UAE, ignoring a small coolant leak can lead to engine repair bills exceeding 15,000 AED within three months.
