Black 2L Radiator Coolant Overflow Water Bottle Expansion Reservoir Tank w/Cap

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

This 2L coolant overflow reservoir tank with cap holds expanding coolant from the radiator and returns it as the system cools, keeping the cooling loop topped off between service intervals.

Overview

The 2L radiator coolant overflow water bottle expansion reservoir tank with cap gives the cooling system a place to send expanding coolant instead of losing it to the road. The included cap seals the reservoir so the coolant returns to the radiator as temperatures drop. This overflow tank suits drivers replacing a cracked, discolored, or leaking factory reservoir on a compact or mid-size vehicle.

Built For Performance

• 2L capacity provides ample reserve volume for expansion and contraction
• Black finish resists visible staining from coolant residue
• Molded body with inlet and overflow provisions for hose routing
• Cap included to seal the reservoir and maintain system pressure balance
• Compact footprint fits tight engine bay mounting locations

On-The-Job Use

• Replacing a brittle factory overflow bottle that has cracked or yellowed
• Routine cooling system service where the original reservoir is removed
• Restoring coolant recovery so the radiator stays full under thermal cycling

Specs At A Glance

Good To Know

Q: Does this reservoir come with the cap? A: Yes, the cap is included as part of this overflow tank assembly so the unit is ready to mount and connect. Q: How should I set the coolant level in this tank? A: Fill to the marked cold level, then check again after a full warm-up and cooldown cycle to confirm the level settles correctly.

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