What to Do When Your Engine Overheats.

You’re cruising along, music up, coffee in the cupholder, not a care in the world. Then suddenly, your dashboard lights up like it’s trying to start a disco. The temperature gauge spikes, steam starts curling out from under the bonnet, and your engine sounds like it’s gasping for breath.

Great. Your car is overheating.

Before you spiral into full-blown panic or make a rookie mistake, here’s a proper guide on what to do when your engine overheats — and how to stop it from happening again.

Step 1: Don’t Ignore the Signs

Your car will almost always give you some warning that it’s running too hot. Maybe it’s a rising temperature needle, a warning light, or the unmistakable steam cloud puffing from your bonnet.

What you shouldn’t do: Pretend it's not happening and keep driving. That’s the express lane to permanent engine damage.

Instead, pull over safely as soon as possible. Turn off the engine, throw on the hazard lights, and breathe. Your car’s not being dramatic — something is genuinely wrong.

Step 2: Hands Off That Bonnet (For Now)

Tempting as it might be to leap out and check what’s going on under the hood, give it time. That engine is hotter than your mate's BBQ grill in July. Wait at least 30 minutes before opening the bonnet, unless you're after an impromptu steam facial and a trip to A&E.

Use this time to stay calm, grab a drink (not from the radiator), and plan your next steps.

Step 3: Check the Coolant Level

Once the engine's cooled down, pop the bonnet and take a look at the coolant reservoir. It’s usually a clear tank with "min" and "max" markers and coloured fluid inside (often pink, green, or orange).

If the level is low, that could be your culprit. Top it up if you have coolant or even plain water as a temporary fix. Just pour slowly and carefully. Think of it like feeding a cranky toddler — patience is key.

Step 4: DO NOT Touch the Radiator Cap

This deserves its own step. Do. Not. Touch. The. Radiator. Cap. Not until the engine is stone cold. That thing is pressurised, and popping it early can unleash a geyser of boiling fluid right into your face.

If you're unsure whether it's safe to touch, wait longer. Better to be late than scorched.

Step 5: Check for Leaks or Puddles

Have a quick peek under the car. Is there a mysterious puddle forming? If your car’s leaking coolant, topping it up won’t do much. You’re dealing with a leak in the cooling system — could be a cracked hose, dodgy water pump, or a rogue radiator.

If it’s leaking like a sieve, it’s mechanic time. Don’t try to nurse it home unless you enjoy roulette with your engine.

Step 6: When to Drive (and When to Call for Help)

If you've topped up the coolant, there's no sign of leaks, and the temperature has come back to normal, you might be okay to drive a short distance to a garage. But keep the heater on full blast. Weird, but it helps pull heat away from the engine.

If that temp gauge creeps up again, pull over and switch off. Don’t take chances. A cooked engine = big bill.

Why Your Car Overheats in the First Place

Overheating usually doesn’t happen out of the blue. Here are the usual suspects:

• Low Coolant — The most common cause. Could be from a leak or just evaporation over time.

• Broken Thermostat — If it sticks closed, coolant can’t circulate.

• Faulty Radiator Fan — No fan = no cooling when stopped or in traffic.

• Clogged Radiator — Years of gunk can block it up.

• Water Pump Woes — If it fails, your coolant can’t move properly.

  
  

The Fix-It Checklist

If your car has overheated once, assume something needs looking at. Here’s your go-to list:

• Top up or flush and replace your coolant.

• Inspect hoses for cracks, bulges, or leaks.

• Get your radiator cleaned or replaced if it looks grimy.

• Check your radiator fan actually kicks in.

• Ask a mechanic to test the thermostat and water pump.

  
  

Prevention is cheaper than repair. A blown head gasket or warped engine block from overheating can easily run into the thousands.

DIY Tips to Avoid Overheating

You don’t have to be a grease monkey to keep your cooling system happy. Try this monthly maintenance routine:

• Check coolant levels and top up if needed.

• Look for leaks under the car.

• Inspect hoses and radiator for signs of ageing.

• Clean bugs and debris from the radiator grill.

• Listen for unusual fan noises.

  
  

If you spot anything off, get it sorted before it gets expensive.

Emergency Kit Must-Haves

Chuck these in your boot:

• 1L bottle of coolant or water

• Gloves (for hot parts)

• Torch (for night checks)

• Breakdown number saved in your phone

• Blanket — overheating can happen in winter too

  
  

Prepared drivers have fewer meltdowns. Literally.

Final Word: Trust Your Gut

If something feels off, don’t wait. Whether it’s strange smells, a noisy fan, or that temp gauge creeping up on a mild day — get it checked.

Your engine is basically the heart of your car. Let it overheat too many times, and you’re looking at engine surgery. Or a full replacement.

So stay alert, stay topped up, and don’t ignore the smoke signals. Your future self (and your wallet) will thank you.

Disclaimer: This article is for general guidance only and is not a substitute for professional mechanical advice. While we aim to provide accurate and practical tips, every vehicle is different, and overheating issues can vary in cause and severity. Always consult a qualified mechanic if your car overheats or if you notice unusual warning signs. Acting promptly and seeking expert help can prevent serious damage and costly repairs.