Your coolant reservoir is a critical overflow container that captures extra coolant fluid once it heats and expands. If it’s busted, pressure builds up inside the system, causing damage to other components.

Replace Your Coolant Reservoir with Ease

Our in-stock product lineup helps you upgrade your existing expansion tank or overflow tank to help maintain proper coolant pressure levels on the toughest of drives. Need to replace a busted pressure-relief valve, we’ve got parts for that too. Everything from caps to full assemblies, these OEM-quality parts ensure your engine cooling system runs smoothly, including your Peterbilt 579 radiator. Backed by warranties and expert support, they deliver dependable performance and peace of mind.