The Heat of the Commute
Auckland traffic is notorious. Whether you are crawling along the Southern Motorway towards Manukau or stuck on the Harbour Bridge, the constant stop-and-go driving puts immense strain on your vehicle's cooling system. When there is little airflow pushing through the radiator to cool the engine naturally, your car relies entirely on its cooling fans and coolant flow.
Why Do Cars Overheat in Traffic?
- 1.**Failed Radiator Fan:** When moving at 100km/h, the wind cools the radiator. In traffic, your radiator fan must do the work. If the fan motor or relay has failed, the temperature gauge will spike quickly.
- 2.**Coolant Leaks:** Old hoses crack, and radiators corrode. A slow leak can suddenly become a major problem when the system is pressurized and running hot.
- 3.**Stuck Thermostat:** If the thermostat is stuck closed, coolant cannot flow into the engine to absorb heat.
- 4.**Water Pump Failure:** The pump circulates coolant. If the impeller is degraded or the drive belt snaps, circulation stops immediately.
What To Do IMMEDIATELY
If your temperature gauge hits the red or you see steam: * Pull Over Safely: Do not try to "make it to the next exit". Pull over to the shoulder immediately. Driving even one kilometre with an overheating engine can warp the cylinder head, costing thousands of dollars. * Turn on the Heater: It sounds counter-intuitive, but turning your cabin heater to full blast pulls heat away from the engine block. * DO NOT OPEN THE RADIATOR CAP: The system is highly pressurized with boiling fluid. Opening the cap will cause a geyser of scalding coolant.
Emergency Mobile Assistance
If you are stuck on an Auckland motorway with an overheating car, Mobile Autoworks NZ can dispatch an emergency mobile mechanic to you. We can pressure-test the cooling system on the side of the road, replace burst hoses, or diagnose fan failures to get you safely home.