The oil cooler lines carry engine oil to and from the oil cooler, helping to regulate engine temperature and prevent overheating. Over time, these lines can crack, wear, or leak, causing oil loss and reduced cooling efficiency. Replacing damaged oil cooler lines keeps the oil system sealed and protects your engine from damage.

What is an oil cooler line replacement?

This service involves removing the worn or leaking oil cooler lines and installing new ones. The mechanic will also check the oil cooler, fittings, and connections to ensure the system is properly sealed and operating correctly.

Why do you need an oil cooler line replacement?

Leaking oil cooler lines reduce oil pressure, cause fluid loss, and can lead to engine overheating or failure if left untreated. Replacing them restores proper lubrication and cooling.

Common signs you need an oil cooler line replacement

• Visible oil leaks under the car near the cooler lines
• Oil spots or puddles on the ground
• Low oil levels requiring frequent top-ups
• Burning oil smell or smoke from the engine bay
• Oil pressure warning light illuminated

What happens during an oil cooler line replacement?

A mechanic will:

1. Inspect the oil cooler lines for leaks or damage
2. Drain the necessary oil from the system
3. Disconnect and remove the old oil cooler lines
4. Install new lines and secure all fittings
5. Refill engine oil and check levels
6. Run the engine to ensure there are no leaks and the oil pressure is correct

How much does an oil cooler line replacement cost?

Replacement typically costs $300–$700, depending on the vehicle. If the oil cooler itself is also damaged, total repairs may cost $800–$1,500+.

Is it unsafe to drive with leaking oil cooler lines?

Yes. Driving with leaking oil cooler lines can cause rapid oil loss, low oil pressure, overheating, and severe engine damage. The issue should be fixed immediately to avoid costly repairs.