Aluminum 2L Radiator Coolant Overflow Water Bottle Expansion Reservoir Tank +Cap

Aluminum 2L Radiator Coolant Overflow Water Bottle Expansion Reservoir Tank with Cap

This 2L aluminum coolant overflow tank replaces a cracked or discolored plastic reservoir, holding expanding coolant so it can be drawn back into the radiator as the engine cools.

Overview

This aluminum coolant overflow tank gives the cooling system a durable place to store expanding coolant instead of letting it spill onto the road. The 2L expansion reservoir tank includes a cap and mounts in the engine bay, keeping the radiator topped up through normal heat cycles. It is a sensible swap for anyone whose factory plastic bottle has cracked, yellowed, or started seeping. The expansion reservoir tank works with a range of cars, trucks, and modified builds.

Built For Performance

• Aluminum body resists cracking and discoloration that affect plastic tanks
• 2 liter capacity holds enough overflow for normal thermal expansion
• Included cap seals the tank and controls internal pressure
• Inlet and outlet fittings allow connection to the radiator overflow hose
• Lightweight construction keeps added weight low in the engine bay
• Polished finish suits both stock and modified engine compartments

On-The-Job Use

• Replacing a cracked factory plastic coolant bottle
• Adding a catch tank to a custom or swapped cooling system
• Keeping coolant contained during track or off-road use
• Cleaning up the engine bay of an older car or truck
• Servicing a vehicle that repeatedly loses coolant

Specs At A Glance

Good To Know

Q: Does this tank come with mounting hardware? A: The listing covers the tank and cap, and mounting brackets or hardware depend on how you plan to secure it, so check your engine bay layout before ordering.

Q: Can I use this as a direct replacement for my plastic overflow bottle? A: It works as a universal overflow tank, but hose sizes and mounting points vary by vehicle, so confirm the inlet and outlet match your setup.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.