What it usually is
- Low coolant from a leakmost common
Hose, radiator, water pump, or heater core leak. Puddle under the car.
Fix: Overheating & Cooling System Repair → - Stuck-closed thermostatcommon
Sudden overheating with a full radiator and cool lower hose.
Fix: Thermostat Replacement → - Cooling fan not runningcommon
Overheats in traffic, fine on the highway.
Fix: Overheating & Cooling System Repair → - Failed water pumpcommon
Weep from the pump, grinding noise, coolant loss.
Fix: Water Pump Replacement → - Clogged radiatorless common
Old coolant, brown sludge, overheats under load.
Fix: Radiator Replacement → - Head gasketless common
White sweet exhaust, milky oil, bubbles in the reservoir. Usually the result of a prior overheat.
Fix: Overheating & Cooling System Repair →
What to do right now
- Turn the heater on full — it pulls heat from the engine.
- Pull over and shut it off as soon as it's safe.
- Don't open the radiator cap while it's hot.
- Text us your location. We'll bring coolant and a pressure tester.
How a mobile mechanic handles it
We come to where the car is — that's the whole point when it's a car overheating situation. We diagnose with a professional scan tool and proper testing, tell you what's wrong and what it costs, and fix it on site when parts allow. Don't drive it to a shop; call us and we'll come to it.
FAQ
Common questions
Can I add water and keep driving?
To get off the highway, yes. To get home 20 miles, no. Water alone doesn't protect the engine and you still have the leak that caused it.