Dubai summers are hard on engines. Heat, traffic and sand all load the cooling system, and an overheating engine that is ignored can damage the cylinder head or head gasket within minutes.
Why overheating is more common in Dubai
- High air temperature: the gap between engine and outside air is smaller, so heat is harder to shed.
- Humidity: speeds up corrosion of cooling parts and connectors.
- Traffic: at low speed the engine relies on the electric fan alone.
- Sand and dust: clog the radiator and condenser.
- Long AC use: adds heat and load.
How the cooling system works
The water pump pushes coolant through the engine to absorb heat, then through the radiator where the fans and airflow cool it. The thermostat controls the flow, and the expansion tank and cap keep the right pressure. Any weak link in that chain can cause overheating.
Warning signs
- The temperature gauge climbs above its usual position
- Steam from under the bonnet
- A coolant or temperature warning light
- A sweet smell (coolant leaking onto hot parts)
- Green or pink spots under the car
- Loss of power or knocking noises
- The heater blows cold (can mean low coolant)
What to do if your engine overheats
- Switch off the AC and turn the heater to full to pull heat away from the engine.
- Stop somewhere safe as soon as you can.
- Switch off the engine.
- Open the bonnet carefully, and never open a hot radiator cap.
- Once the engine is fully cool, check the coolant level in the expansion tank.
- Call a workshop rather than driving on.
Common causes
- Low coolant or leaks from hoses, the radiator or the water pump
- A thermostat stuck closed
- A failed water pump
- A radiator blocked inside or out
- A dead cooling fan or fan relay
- Old coolant that has lost its protection
- A failed head gasket (the most serious cause)
Prevention
- Check the coolant level with the engine cold
- Change coolant at the maker's interval, with the correct type
- Clean sand out of the radiator and condenser
- Inspect hoses for cracks or swelling, especially plastic parts on German cars
- Watch the temperature gauge, and have the system checked before long trips
German cars: what to watch
On Mercedes, BMW and Audi, many thermostat housings, expansion tanks and hoses are plastic and crack with heat, and some BMWs use an electric water pump. On Porsche, the front radiators collect sand and leaves. Checking these at every service prevents most surprises.
Do and don't
Do: stop, run the heater, let the engine cool and get help. Don't: open a hot radiator cap, pour cold water on a hot engine, or keep driving with the gauge in the red.
We pressure-test cooling systems and repair radiators, water pumps, thermostats and fans. More about radiator and overheating repair.
Need a hand with your car?
Partinn Auto Service is an independent workshop in Dubai Investment Park 2 (DIP 2). Send your car model and the problem on WhatsApp 052 296 5483 or call 058 821 2219. We are open Monday to Saturday, 9 AM to 10 PM.
