Freightliner Columbia 112/120 Coolant Reservoirs

Frequently Asked Questions About Freightliner Columbia 112/120 Coolant Reservoirs

What does the coolant reservoir do, and why does it need to be replaced?

The coolant reservoir stores excess coolant and allows it to expand and contract as engine temperatures change, while also providing a way to check fluid levels and bleed air from the cooling system. Reservoirs are typically replaced when they crack, develop leaks, or become discolored and brittle from prolonged heat exposure, which can lead to coolant loss and overheating issues.

Will this reservoir fit my specific Freightliner Columbia 112 or 120?

Coolant reservoirs can vary by production year, cab configuration, and cooling system setup, so it's important to verify fit using your truck's VIN or by comparing the reservoir's shape, mounting points, and hose/sensor connections to your original part. If you're unsure, our team can help confirm compatibility before you order.

Is this reservoir made from the same material as the original equipment part?

Most replacement coolant reservoirs are made from durable, translucent or semi-translucent plastic similar to OEM units, which allows you to visually check coolant levels without opening the cap. This material is designed to withstand engine bay heat and pressure changes, though quality can vary between manufacturers.

How difficult is it to install a new coolant reservoir?

Installation is generally straightforward and can often be done with basic hand tools. The process typically involves draining or managing existing coolant, disconnecting hoses and any sensor wiring, unbolting the old reservoir, and mounting the new one in the same location. Always let the engine cool completely before beginning any coolant system work.

Does the reservoir come with a cap, sensor, or mounting hardware included?

This varies by product, as some reservoirs include the cap and level sensor while others require you to transfer these components from your old unit. Check the product listing details or reach out to our team to confirm exactly what's included before you purchase, so you're not caught without a necessary part during installation.