Engine Overheating Repair
An engine that overheats is losing the fight to move heat out of the block, and every extra minute of driving raises the chance of a warped cylinder head. We find why the coolant is not circulating or cooling, then repair the cause rather than topping up and hoping.
From AED 399Written quote after diagnosis, before work startsConvenience fee applicable · shown on your written quote
- 3 hours to 1 day, longer if the head gasket is involved
- Pickup and delivery from your door
- Convenience fee applicable · shown on your written quote
- Diagnosis free with repair
Signs you need engine overheating repair
- Temperature needle above the middle or a red coolant warning in the cluster
- Steam or a sweet smell from under the bonnet after you stop
- Coolant reservoir empty again a few days after you filled it
- Heater blowing cold while the engine is hot
- The engine loses power or pings when the gauge is high
- Overheating only in traffic, improving once you are moving at speed
What usually causes it
Coolant leak
Rubber hoses harden in heat, plastic radiator end tanks crack where they meet the aluminium core, and water pump seals weep through a small drain hole. A pressure tester finds seeps that only open when the system is hot.
Cooling fan not working
If the engine overheats at idle but not at speed, suspect the electric fan, its relay or a fan control module. At speed, air pushed through the grille does the fan's job.
Thermostat stuck closed
The thermostat holds coolant back until the engine warms up. When it jams shut, the upper radiator hose stays cool while the gauge runs away, a quick check for the technician.
Blocked radiator or air in the system
Dust and debris packed between the condenser and radiator fins, or scale inside the tubes, cut heat transfer. An airlock after a poor refill traps a steam pocket round the temperature sensor.
How we do engine overheating repair
- 1
Safe inspection
We never open a hot cap. Once cool, we check coolant level and colour, oil cap for milky residue, and hoses and belts for damage.
- 2
Pressure test
The cooling system is pressurised with a hand pump to about the cap rating. Drips, a falling needle or coolant at the water pump weep hole show where it escapes.
- 3
Component tests
Fan operation is commanded with a scanner, the thermostat opening temperature is verified, and a chemical block test checks the coolant for exhaust gas from a failing head gasket.
- 4
Repair and bleed
Failed parts are replaced, the radiator is flushed if needed, and the system is refilled with the coolant type your manufacturer specifies and bled of air. We road test until the temperature holds steady.
By make and model
BMW
Many BMW models use plastic cooling parts, including expansion tanks and thermostat housings, that become brittle with age and heat and are a frequent cause of coolant loss.
Mercedes-Benz
Several Mercedes engines use plastic coolant flanges and connectors that crack over time; a pressure test usually shows the weeping joint.
In Dubai, Sharjah and Ajman
At 45 degrees or more, the cooling system has almost no margin. Cars that idle in a queue with the AC on can overheat when a fan is slowing down or the radiator is half clogged by sand, a problem rarely seen in cooler countries. If the gauge rises, turn the AC off, heater on full, and stop somewhere safe.
Questions about engine overheating repair
Can I keep driving a short distance if it is overheating?
No. A few minutes of driving with a gauge in the red can warp the head or blow the gasket, turning a repair of a few hundred dirhams into a major rebuild. Stop, let it cool and call us.
Is adding water enough?
Only as an emergency measure. Plain water lacks corrosion protection and boils at a lower point than the correct mix, and it does nothing about why the coolant left.
How do I know it is the head gasket and not a hose?
A chemical test of the coolant detects combustion gas, and a pressure test shows whether pressure rises with no external leak. Both are done before you commit to an expensive job.
Do you tow or collect an overheated car?
We arrange pickup and delivery to our workshop. Every cost is itemised on your written quote before work starts.
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Tell us about your car. You get an itemised quote before any work starts, and you choose OEM, aftermarket or used parts.