Coolant Reservoirs & Overflow Tanks for LS, Coyote, WRX & 2JZ

What This Coolant Reservoirs Collection Covers

Coolant reservoirs, overflow tanks, and expansion tanks manage coolant expansion and recovery while giving the engine bay a more durable or cleaner finished look. The collection includes application-specific aluminum tanks for Cummins, Duramax, WRX, Tacoma, F-150, Corvette, and other platforms, plus universal catch tanks, polished reservoirs, ice tanks, covers, and related cooling system hardware.

Pressurized Expansion Tanks and Overflow Bottles

Identify the cooling system layout first

A pressurized expansion tank is part of the sealed cooling circuit and can serve as the fill point. A non-pressurized overflow tank collects coolant displaced by the radiator system. Confirm which design your vehicle uses before selecting a replacement or upgrade.

Billet, Aluminum, and Stainless Upgrades

Improve durability and engine-bay appearance

Billet aluminum, fabricated aluminum, and polished stainless reservoirs can resist the heat cycling that often damages factory plastic tanks. Match hose connections, cap type, mounting points, and sensor provisions to the vehicle or custom cooling layout.

Direct-Fit Vehicle Reservoirs

Use exact platform details

Direct-fit coolant tanks are available for applications including Ram Cummins, GM Duramax, Subaru WRX and STI, Toyota Tacoma, Land Cruiser, 4Runner, Ford F-150 and Raptor, Corvette, and Dodge Charger or Challenger. Use the vehicle filter to confirm the exact years and engine.

Universal Tanks and Custom Cooling

Build a serviceable overflow system

Universal coolant catch tanks and overflow reservoirs can support an engine swap, track car, or custom engine bay. Choose capacity, inlet and outlet locations, mounting style, and cap or vent design around the complete cooling system.

Installation and Cooling System Service

Protect the whole system

Inspect hoses, clamps, radiator cap, pressure rating, and coolant condition when replacing a reservoir. Bleed the system using the vehicle procedure and recheck level only after the engine has cooled. Never open a hot pressurized cooling system.

Top Cooling System Brands

• Mishimoto. Aluminum expansion tanks, radiators, and cooling upgrades
• COBB. Subaru and Ford coolant overflow tanks and covers
• Wehrli. Cummins and Duramax aluminum coolant tanks
• Fleece Performance. Diesel truck cooling system upgrades
• Weapon-R. Universal and import coolant overflow tanks
• JLT. Engine bay covers and appearance accessories
• CPR. Corvette ice tanks and cooling solutions
• CSF. Radiators and cooling system components
• Koyo. Performance radiators and cooling hardware
• Moroso. Race car catch tanks and cooling accessories
• Radium Engineering. Fluid control and expansion hardware
• Vibrant. Cooling plumbing and fabrication components
• Garrett. Charge-air and cooling support parts
• APR. Performance cooling upgrades
• GrimmSpeed. Subaru cooling system components

How to Choose the Correct Coolant Reservoir

• Confirm whether the vehicle uses a pressurized expansion tank or non-pressurized overflow bottle
• Match the exact year, make, model, engine, and trim for direct-fit reservoirs
• Verify hose diameter, hose location, cap type, and sensor or level provision
• Measure mounting location and bracket clearance for universal tanks
• Choose aluminum, billet, stainless, or plastic construction for the intended use
• Check capacity against the cooling system and expected expansion volume
• Inspect the radiator cap or reservoir cap pressure rating before replacement
• Replace cracked hoses, weak clamps, and damaged fittings during the same service
• Follow the manufacturer coolant fill and bleeding procedure after installation
• Check for leaks only after the engine has cooled and the system can be inspected safely

Common Questions

What is the difference between a coolant reservoir and overflow tank?

A pressurized reservoir is part of the sealed cooling system. An overflow tank usually stores coolant displaced from a radiator-cap system without holding full system pressure.

How do I know if my coolant reservoir is failing?

Look for cracks, staining, leaks, a damaged cap seat, loose fittings, or unexplained coolant loss. Inspect only when the system is cool.

Can I replace a plastic reservoir with an aluminum tank?

Yes when the tank is designed for the exact vehicle or custom system. Confirm hose routing, cap type, mounting, and pressure requirements.

What is an ice tank?

An ice tank is an added reservoir used in some supercharged or track-oriented intercooler cooling systems to increase coolant volume and cooling capacity.

Do universal overflow tanks fit any car?

Universal tanks require planning around capacity, hose routing, mounting, and cooling system design. They are not direct replacements for every vehicle.

Should I replace the reservoir cap too?

A worn cap can cause pressure or coolant recovery problems. Replace it when the manufacturer recommends or when inspection shows damage.

How do I choose a reservoir for a WRX?

Filter by exact WRX or STI year and engine, then confirm hose, cap, and mounting compatibility on the product page.

Can a coolant tank improve engine bay appearance?

Yes. Polished, billet, and fabricated tanks can give a custom or upgraded appearance while providing a durable reservoir solution.

Do I need to bleed the cooling system after replacement?

Yes. Follow the vehicle-specific fill and bleeding procedure so trapped air does not cause poor heater operation or overheating.

Can Black Ops Auto Works help with coolant tank fitment?

Yes. Share the vehicle year, model, engine, and whether the system uses a pressurized reservoir or an overflow bottle.

Why Buy Coolant Reservoirs from Black Ops Auto Works

Black Ops Auto Works stocks 119 Coolant Reservoirs SKUs with real fitment data, competitive pricing, and support from staff who build these vehicles themselves. Products are filterable by year, make, model, trim, engine, and drivetrain to confirm the correct application before ordering.

For focused shopping, browse our Radiators, Cooling, Water Pumps, Fans & Shrouds, Silicone Couplers & Hoses, Mishimoto, CSF, Koyo.