Thorstone 16-Piece No-Spill Coolant Funnel Kit

The Thorstone 16-Piece No-Spill Coolant Funnel Kit is a heat-resistant, universal radiator bleeding system that lets you refill and purge cooling systems without splashes or trapped air.

Whether you’re topping off after a repair, flushing a radiator or replacing coolant, the Thorstone kit simplifies the job by combining a clear high-temperature funnel with multiple adapters, elbows and extenders. Built from ECO-PP plastic rated to 395°F (200°C), the set is durable enough for workshop use and clear so you can watch fluid levels and see air bubbles as they escape. The parts snap together for different cap geometries and tight engine bays, making this a versatile addition to home mechanics and professional technicians alike.

How does this kit prevent spills and trapped air during coolant refills?

The kit’s transparent funnel and snug-fitting adapters create a controlled fill path that reduces splashing and helps you spot air pockets. Using the included elbows and extender, you can position the funnel so coolant returns smoothly into the system while trapped air is vented out.

• Clear funnel for visual monitoring of fluid and bubbles
• Multiple adapters for a tight, no-leak seal on different radiator necks
• 45° elbows and a 5" extender to reach awkward cap positions

Will these pieces fit my vehicle’s radiator neck?

The Thorstone kit includes four filler caps and five adapters designed to work with a wide range of domestic and import vehicles. It’s intended to accommodate common neck sizes used by manufacturers like GM, Ford, Toyota, Volkswagen, Honda, Subaru and BMW.

• Four filler caps for varied neck profiles
• Five adapters for fine-tuning the fit
• Compatible with most cars, SUVs and light trucks

Can I use this kit in tight engine bays and unusual radiator positions?

Yes — the kit’s configurable layout makes it suitable for confined spaces and angled radiator inlets. The 45° elbows and 5" straight extender combine to reach recessed or offset caps without forcing the vehicle into unnatural positions.

• Two 45° elbows for angled access
• 5" straight extension for deeper necks
• Interlocking components to assemble custom orientations

What durability and safety features should I expect from the funnel kit?

Parts are made from heat-resistant ECO-PP plastic rated to 395°F (200°C), resisting deformation from hot coolant and accidental workshop drops. The transparent material also helps prevent overfilling by letting you watch fluid reach the correct level.

• ECO-PP construction for high-temperature resistance
• Impact-tolerant design for workshop use
• Transparent funnel for safer, controlled filling

Who is this for? The Thorstone 16-Piece No-Spill Coolant Funnel Kit is built for DIY enthusiasts, independent mechanics and fleet technicians who need a reliable, no-fuss solution for refilling and bleeding cooling systems. If you work on multiple vehicle makes or regularly perform coolant service, the universal adapters, elbows and extender let you tackle jobs faster and cleaner, while Thorstone’s lifetime product support offers help if a part needs replacing or adapting.