Radium Engineering Off-Road Coolant Tank Kit – BRP Can-Am / Ski-Doo / Sea-Doo | Rotax | 20-0853

Radium Engineering 20-0853 CNC-machined billet aluminium coolant header tank kit for select BRP Can-Am, Ski-Doo, and Sea-Doo vehicles. Direct bolt-in replacement for the factory plastic coolant tank, using OEM mounting points. Includes all fittings, hardware, and hoses required for a complete installation — no additional sourcing required. 4.3 lbs. Ships fast across Canada and the US.

Why Replace the Factory Plastic Coolant Tank

BRP’s Rotax-powered vehicles use a factory plastic coolant header/overflow tank. In stock, recreational use, this tank functions adequately. In performance, race, and sustained high-demand applications, the factory plastic unit introduces reliability risks that the Radium billet aluminium replacement eliminates:

• Heat degradation: Plastic coolant tanks are subject to thermal degradation over repeated high heat cycles. Sustained elevated coolant temperatures — common in race, trail, or hard use conditions — cause plastic to embrittle, deform, and eventually crack. A cracked coolant tank in the field on a snowmobile or side-by-side is a stranded-vehicle failure. Aluminium is unaffected by coolant operating temperatures.
• Pressure integrity: The factory plastic tank is rated for OEM cooling system pressure. Builds running higher coolant system pressure (performance cooling upgrades, higher output engines) can exceed the factory tank’s pressure rating. The Radium billet tank handles significantly higher pressure without deformation or failure.
• Age-related cracking: Older BRP vehicles with the original plastic tank are at elevated risk of coolant tank failure through simple material age and UV degradation. The Radium replacement is a permanent solution — aluminium does not embrittle with age the way plastic does.
• Leak risk elimination: Coolant leaks from a cracked or failed factory tank cause overheating and engine damage. On a snowmobile or ATV in a remote location, this is a serious problem. Eliminating the factory plastic tank removes the primary coolant system failure point in these vehicles.

20-0853 Kit Contents and Construction

• CNC-machined billet aluminium tank body: Radium’s 20-0853 tank is machined from 6061 billet aluminium to precise wall thickness and pressure-rated geometry. Anodised finish for corrosion resistance. The billet construction produces a tank that is visually cleaner and more precisely dimensioned than cast alternatives.
• Complete installation hardware: The kit designation means all fittings, hose connections, mounting hardware, and ancillary components required for a complete installation are included. No additional parts sourcing is needed beyond the kit itself.
• Bolt-in installation: The 20-0853 mounts to the OEM coolant tank mounting points on the applicable BRP chassis. No chassis modification, drilling, or fabrication is required. The tank geometry is specific to the BRP application — it is not a universal tank with adapters.
• OEM connection compatibility: All coolant hose connections, overflow routing, and pressure cap fitment are designed to mate with the existing factory cooling system components on the applicable BRP platform.

BRP Rotax Platform Context

The 20-0853’s breadth across Can-Am, Ski-Doo, and Sea-Doo reflects the common Rotax engine cooling system architecture shared across BRP’s powersports lineup. BRP’s Rotax division (Gunskirchen, Austria) supplies engines to all BRP brands — the same Rotax 4-stroke or 2-stroke engine variants appear across multiple platforms with shared cooling system geometry. Radium’s 20-0853 is designed around this shared architecture, making a single tank kit applicable across multiple product families. Confirmed application categories include select models across:

• Can-Am Side-by-Side (Maverick series): Performance side-by-side vehicles where engine bay access and sustained performance use are common. The Maverick X3 Rotax engine in race and trail builds benefits from the improved heat management of the billet tank.
• Can-Am ATV (Outlander / Renegade): Rotax-powered ATVs in hard trail, enduro, and sport use.
• Ski-Doo Snowmobile (MXZ / Renegade / Summit): Performance snowmobile applications where sustained high-output use and remote operation make cooling system reliability critical.
• Sea-Doo Personal Watercraft (RXP / RXT / GTX): High-performance PWC where elevated coolant temperatures under hard use or racing conditions are a consideration.

Confirm your specific model and year against Radium’s fitment documentation before ordering.

Confirm BRP model fitment before ordering — not universal across all BRP vehicles. CNC billet aluminium, anodised. Replaces factory plastic coolant tank. Bolt-in OEM mounting. Complete kit — all hardware included. 4.3 lbs.

Specifications

• Brand: Radium Engineering
• Part Number: 20-0853
• Type: Coolant header tank kit — complete
• Material: CNC-machined 6061 billet aluminium, anodised
• Application: Select BRP Can-Am / Ski-Doo / Sea-Doo — Rotax-powered — confirm model fitment
• Installation: Bolt-in, OEM mounting points
• Includes: Billet tank body, all fittings, hardware, and hoses
• Replaces: Factory plastic coolant tank
• Weight: 4.3 lbs (complete kit)