Car Overheating: Causes, What To Do, and When To Call for Help
Steam from the hood is a stop-driving emergency. Here's the right response sequence.
What to do the moment the temp gauge climbs
Turn off the AC, turn the heater on full hot — the heater core acts as a backup radiator. Pull over as soon as it's safe. Shut the engine off. Open the hood only after you're certain it's safe to do so, but never open the radiator cap on a hot engine.
Common causes: failed water pump, stuck thermostat, blown head gasket, low coolant from a leak, or a broken radiator fan. A mobile mechanic with a pressure tester can usually find the cause in 30-45 minutes.
FAQ
Can I keep driving if my car overheats?
No. Continuing to drive an overheating engine can warp the head, blow the head gasket, or seize the engine. Pull over.
Should I add water to the radiator?
Only after the engine has cooled completely — opening a hot radiator cap can cause serious burns.