Hero image

Why Is My Car Overheating? Common Causes and What to Do

If your temperature gauge is climbing, a coolant warning light has appeared or you can see steam coming from under the bonnet, your car may be overheating. It is important not to ignore the signs, as driving an overheated vehicle can result in serious engine damage and costly repairs.

At Westside Mechanical, we provide cooling-system inspections, diagnostics and repairs for drivers in Graceville and surrounding Brisbane suburbs.

Common causes of an overheating car

Your cooling system works to control engine temperature while you drive. It relies on several components, including the radiator, coolant, hoses, thermostat, water pump and cooling fan. If one part is leaking, blocked, worn or not working correctly, your engine can quickly become too hot. Some of the most common causes include:

  • Low coolant due to a leak
  • Split, loose or damaged radiator hoses
  • A leaking, blocked or damaged radiator
  • A faulty thermostat
  • A worn or failing water pump
  • Cooling fans that are not switching on
  • Old, contaminated or incorrect coolant
  • A blown head gasket or other internal engine fault
  • Extra engine load from towing, stop-start traffic or hot weather

Signs your cooling system needs attention

Your car may be overheating if you notice:

  • The temperature gauge moving into the red
  • A temperature or coolant warning light
  • Steam from the engine bay
  • A sweet smell from leaking coolant
  • Coolant puddles under the vehicle
  • The heater blowing cold air
  • Loss of power, rough running or unusual engine noises
  • The coolant level needing frequent top-ups

What should I do if my car overheats?

If your vehicle begins to overheat, pull over safely as soon as possible and switch off the engine. Do not keep driving in the hope that the temperature will come down.

Never open the radiator cap or coolant reservoir while the engine is hot. Hot coolant is pressurised and can cause serious burns. Allow the vehicle to cool completely, then organise an inspection. If you are unsure whether it is safe to drive, arrange roadside assistance or a tow.

Cooling-system inspections and repairs in Graceville

An overheating vehicle needs more than a quick coolant top-up. At Westside Mechanical, our experienced team can inspect your cooling system, identify leaks and faults, and check components including the radiator, hoses, thermostat, water pump, cooling fan and coolant condition.

We use up-to-date diagnostic equipment and quality parts to provide reliable repairs for a wide range of makes and models, including diesel and European vehicles.

Regular servicing is one of the best ways to spot cooling-system concerns early. If your car is running hot, losing coolant or displaying a temperature warning light, book an inspection with Westside Mechanical in Graceville before a minor issue turns into major engine damage.

Related articles

Thumbnail for Engine Cooling Systems: Keeping Your Car Safe, Reliable and On The Road
Article
Engine Cooling Systems: Keeping Your Car Safe, Reliable and On The Road

The engine cooling system in your vehicle works around the clock to regulate your engine's temperature.

Read more
Thumbnail for Is keeping your cool costing you fuel?
Article
Is keeping your cool costing you fuel?

Keep your cool with less fuel this summer with an Air Conditioning Service in Graceville from Westside Mechanical (AU11046)…

Read more
Thumbnail for Westside Mechanical can service your vehicle, any make or model!
Article
Westside Mechanical can service your vehicle, any make or model!

Makes & Models we service, Log book service in Graceville

Read more