Thorstone Radiator Coolant Funnel Kit 16-Piece — No-Spill Clear Heat-Resistant Bleeder

Thorstone's 16-piece No-Spill Coolant Funnel Kit is a complete radiator bleeding and coolant-filling system that prevents spills and helps purge trapped air for cleaner, safer coolant changes. Whether you're doing routine coolant maintenance, flushing a cooling system, or replacing a radiator, this kit gives you the adaptors and fittings to connect a clear, heat-resistant funnel to most filler necks. Built from ECO-PP plastic rated to 395°F (200°C), the kit is transparent for easy fluid-level viewing and includes extensions to reach awkward or recessed caps. The modular design fits a wide range of domestic and import vehicles and is intended to make bleeding and topping off coolant faster and less messy.

How does this kit help remove air from my cooling system?

The funnel acts as a reservoir that keeps coolant in constant contact with the system while you run the engine and open bleed points, making it easier for trapped air to escape. Using the clear funnel you can watch fluid level and bubbles, so you know when air is expelled and the cooling system is properly filled.

• Transparent funnel shows fluid movement and bubbles for visual confirmation.
• Fits directly to filler necks to feed coolant while the engine circulates.
• Includes elbow and extender for angled systems and hard-to-reach caps.
• Designed to minimize spills during top-offs and bleed procedures.

Will the pieces work with my car’s radiator cap and tight engine bays?

The kit includes four filler caps and five adapters to accommodate a wide variety of OEM neck sizes, plus a 5" straight extender and two 45° elbows for tight or offset locations. The modular connections let you combine parts for custom reach and angle without forcing components into cramped spaces.

• Four filler caps cover common domestic and import sizes.
• Five adapters broaden compatibility across brands like GM, Ford, Toyota, VW and more.
• 45° elbows and a 5" extender solve clearance problems in crowded engine bays.
• Snap-fit joins keep assembly secure during use.

Is the kit durable and safe to use with hot coolant?

All components are molded from heat-resistant ECO-PP plastic rated up to 395°F (200°C), so they resist deformation and accidental damage during normal service. The sturdy material and clear funnel allow repeated use while standing up to drops and the thermal environment near a running engine.

• ECO-PP construction tolerates high temperatures and routine shop wear.
• Clear funnel resists clouding for ongoing visibility of coolant level.
• Robust connectors reduce risk of leaks during bleeding or refilling.
• Lightweight design is easier to handle than metal alternatives.

What comes in the 16-piece set and how do I use it?

The kit ships with a transparent funnel, multiple caps and adapters, two 45° elbows, a 5" straight extender and all necessary fittings to adapt to most filler openings. To use, assemble the required adapter and elbow or extender, attach the funnel, fill it with coolant, run the engine per manufacturer guidance and open bleed points until bubbles stop appearing.

• Contents: 1 clear funnel, 4 filler caps, 5 adapters, 2 elbows, 1 extender, assorted fittings (16 pieces total).
• Assemble the parts that match your radiator neck and secure them before filling.
• Monitor the funnel for bubbles; adjust connections or bleed screws as needed.
• Dispose of or recycle old coolant responsibly after service.

Who is this for: The Thorstone 16-piece No-Spill Coolant Funnel Kit is suited for DIY mechanics, professional technicians, and fleet maintenance teams who need a versatile, spill-reducing solution for bleeding and refilling cooling systems. It’s especially useful if you service multiple vehicle makes or regularly encounter recessed or angled filler necks that standard funnels can’t reach. Backed by Thorstone’s lifetime product support and 24/7 customer service, the kit aims to simplify coolant work and reduce mess on cars, SUVs, and light trucks.

FAQ

Q: Can this kit fit my vehicle’s radiator neck?

A: The set includes multiple adapters and four filler caps to fit most domestic and import radiator necks, including GM, Ford, Toyota, Honda and more.

Q: Is the funnel safe around hot coolant?

A: Yes. Components are molded from ECO-PP plastic rated to 395°F (200°C) for heat resistance during normal coolant service.