The radiator is a critical part of your car’s cooling system, responsible for keeping the engine at a safe operating temperature. It transfers heat from the coolant to the outside air, preventing overheating. Over time, radiators can develop leaks, clogs, or corrosion, reducing their ability to cool the engine. Replacing a faulty radiator ensures reliable cooling and protects the engine from severe damage.

What is a radiator replacement?

This service involves removing the old, leaking, or blocked radiator and fitting a new one. The mechanic will also replace coolant, inspect hoses and clamps, and bleed the system to remove air pockets.

Why do you need a radiator replacement?

A faulty radiator can’t properly regulate engine temperature. This can cause overheating, coolant loss, and engine damage. A new radiator restores efficient cooling and prevents breakdowns.

Common signs you need a radiator replacement

• Coolant leaking under the car
• Engine overheating or running hotter than normal
• Rust or corrosion visible on the radiator
• Low coolant levels despite top-ups
• Steam from under the bonnet
• Clogged or damaged radiator fins

What happens during a radiator replacement?

A mechanic will:

1. Inspect the cooling system for leaks or blockages
2. Drain the old coolant
3. Remove the old radiator, hoses, and clamps
4. Install a new radiator and reconnect hoses and fittings
5. Refill the system with fresh coolant
6. Bleed air from the system to restore proper circulation
7. Test run the engine to confirm efficient cooling

How much does a radiator replacement cost?

Radiator replacement typically costs $450–$1,000, depending on the vehicle’s make and model. Luxury or performance cars may cost more due to complex cooling systems.

Is it unsafe to drive with a bad radiator?

Yes. A leaking or blocked radiator can cause rapid overheating, which may result in blown head gaskets or complete engine failure. Driving should be avoided until the radiator is repaired or replaced.