Freightliner Cascadia Coolant Reservoir / Overflow Tank 12.8L (2018–2022) – 603-1316, Replaces A0532836000

Keep your late-model Cascadia running at the right temperature with the ROADWEST 603-1316 Engine Coolant Reservoir Tank. Designed as a direct replacement for the factory tank on 2018–2022 Freightliner Cascadia trucks, this heavy duty coolant overflow reservoir restores proper coolant storage and circulation in demanding commercial use.

Built with a generous 12.8 L capacity and a 20 PSI cap maximum pressure rating, this tank is engineered to handle long hours on the road, high underhood temperatures and continuous vibration. The OE-style design matches the original mounting points and dimensions, making installation clean and straightforward for fleet shops and owner-operators.

Whether you’re replacing a cracked, leaking or discolored reservoir, this unit helps maintain correct coolant levels and flow, so the engine can reach and hold its optimal working temperature more quickly and reliably.

• Direct replacement for Cascadia – ROADWEST 603-1316 engine coolant reservoir tank is designed to fit 2018, 2019, 2020, 2021, 2022 Freightliner Cascadia models.
• OE cross reference – Replaces OEM coolant overflow tank OE# A0532836000 for a factory-style fit and function.
• Heavy duty capacity – Features a 12.8 L capacity and 20 PSI cap maximum pressure rating to support modern HD cooling system requirements.
• Application-specific dimensions – Approximate dimensions: Height: 880 mm, Length: 307 mm, with mounting holes threaded M6-1.0 for correct installation.
• Engineered for reliability – Quality construction resists heat and vibration, helping prevent leaks and premature failure compared to worn or damaged original tanks.
• Restores cooling performance – Helps control coolant flow so the engine reaches operating temperature quickly and stays within a safe range under load.
• Ready-to-install kit – Supplied as a heavy duty reservoir tank with 2 caps, simplifying replacement and reducing downtime.
• Fitment note – Always confirm your truck’s year, model and OE number before ordering to ensure this premium radiator coolant overflow tank is the correct application.

Package Includes:

• 1 × Heavy Duty Engine Coolant Reservoir Tank (603-1316 style)
• 2 × Coolant Reservoir Caps