Engine Overheating: Common Causes & What to Do

An overheating engine is an emergency. If your temperature gauge goes into the red or you see steam coming from under the hood, pull over immediately and safely. Driving with an overheating engine can cause catastrophic damage in minutes.

At the shop, we'll explain the most common causes and exactly what to do if this happens to you.

What to Do Immediately

Pull over safely as soon as possible.
Turn off the engine and put on hazard lights.
Do NOT open the hood right away — coolant is under pressure and scalding.
Wait 15-20 minutes for the engine to cool down.
Check coolant level (careful, it's hot).
Get towed if needed. Don't resume driving if the problem persists.

Most Common Causes

Coolant leak: punctured hose, head gasket, cracked radiator.
Stuck thermostat: prevents coolant circulation. Cheap part but critical.
Failing water pump: no longer circulating fluid through the engine.
Radiator fan: not activating, especially in city traffic.
Clogged radiator: debris or internal corrosion buildup.

Repair Costs

Thermostat: $100 to $300.
Water pump: $300 to $700.
Radiator: $400 to $900.
Head gasket: $1,000 to $2,500+ (the most serious repair).

Key Takeaways

Overheating engine = pull over immediately.
NEVER keep driving with an overheating engine.
A $200 thermostat can save a $5,000 engine.
Check your coolant regularly.
Have the cooling system checked during your seasonal maintenance.

Frequently Asked Questions

Can I drive to the shop if the engine overheats?

No. Pull over safely and get towed. A few minutes of overheating can destroy an engine.

How long before the engine is damaged?

In severe overheating, damage can occur in 5 to 10 minutes. Don't wait.

Does coolant have a shelf life?

Yes, it should be replaced every 3 to 5 years depending on type.

Is overheating related to brakes?

Not directly, but a stuck brake caliper can generate excessive heat that contributes to overheating.

Can alignment cause overheating?

No, but excessive rolling resistance (under-inflated tires) can contribute indirectly.

Want us to check this quickly?

Garage Path57 — 7971 15e Ave, Montreal, QC H1Z 3N5

Call us or Book your visit if your engine has overheated.

Garage Path57 · 7971 15e Avenue, Montréal (QC) H1Z 3N5 · (514) 433-7479