Thorstone No-Spill Coolant Funnel Kit 16-Piece — Transparent Radiator Bleeder with Extender

Thorstone 16-Piece No-Spill Coolant Funnel Kit is a complete radiator bleeding and refill system that lets you top off and purge cooling systems cleanly, even in tight engine bays.

When you replace coolant, flush a radiator, or perform head-gasket or hose work, trapped air can cause hotspots and poor circulation. This 16-piece kit gives you a transparent funnel, multiple adapters and elbows, and an extender designed to fit most domestic and import cars, SUVs and light trucks—so you can refill and bleed without spills or repeated trips to the shop.

How does this kit remove air from the cooling system?

The Thorstone funnel creates a sealed, elevated fill point that allows coolant to push trapped air out as you top up the system. Transparent construction makes it easy to see bubbles exiting, so you can continue filling until only liquid flows.

• Clear funnel shows fluid and bubble movement for visual confirmation.
• Sealed adapters prevent mess while directing coolant and air upward.
• 45° elbows and an extender let you reach awkward radiator necks for a proper bleed.

Will this fit my vehicle’s radiator or overflow port?

The kit includes multiple filler caps and adapters to match common OEM fill necks and expansion tanks from GM, Ford, Toyota, Honda, VW, Subaru, BMW and many others. Adapters snap together to form the correct profile for your application.

• Four filler caps to cover a wide range of OEM neck dimensions.
• Five adapters for tapered or irregular openings.
• Components combine to adapt to both straight and angled fill points.

What materials and temperature limits should I expect?

All plastic parts are molded from heat-resistant ECO-PP that tolerates routine workshop temperatures and accidental exposure to hot coolant. The kit is engineered for durability during service tasks and resists cracking from drops or repeated use.

• ECO-PP construction rated up to 395°F (200°C).
• Durable finish resists deformation during normal service handling.
• Clear funnel section maintains visibility without discoloring quickly.

How do the different pieces help with angled or confined engine compartments?

Two 45° elbows and a 5" straight extension let you route the funnel assembly around intake manifolds, strut towers and other obstructions. Mix and match pieces to form an access path that reaches the radiator neck without forcing or spillage.

• Two 45° elbows for offset fill points and tight angles.
• 5" extender provides additional reach in deep engine bays.
• Modular design allows secure connections for steady, hands-free filling.

Who this is for: If you service your own cooling system, maintain a fleet, or want a safer, cleaner way to refill and bleed radiators at home, this Thorstone kit is built for mechanics and DIYers who need a universal, reusable toolset. It’s especially useful when working on vehicles with hard-to-reach fill necks or when you want to verify air-free coolant circulation after a flush or repair. Backed by Thorstone lifetime support and around-the-clock customer service, the kit provides a durable, adaptable solution for most cars, SUVs and light trucks.