DAYUAN Radiator Pressure Tester Kit 28-Piece Universal Set — 0–35 PSI, Color-Coded Adapters

DAYUAN 28-piece Radiator Pressure Tester Kit is a complete universal set for checking cooling-system leaks, testing radiator caps, and vacuum-purging and refilling coolant on most passenger vehicles.

This professional-grade kit combines a hand pump, dual vacuum purge and refill tools, a range of radiator cap adapters, and chrome steel fittings so you can diagnose pressure leaks and service coolant circuits without repeatedly buying special adapters. The kit covers common domestic and European makes, supports 0–35 psi testing range, and organizes adapters by color for fast selection.

How do I use this kit to find a radiator leak?

Attach the correct cap adapter to the radiator neck, connect the hand pump and build pressure up to the vehicle's specified test value. Inspect hoses, radiator core, heater connections and the water pump area for escaping coolant or air bubbles while under pressure.

• Select the color-coded adapter that fits the radiator opening.
• Use the hand pump to pressurize to the recommended psi (0–35 psi range).
• Visually check for wet spots, drips, or bubbles; listen for hissing leaks.
• If no external leak appears, consider pressure-testing the cap with included cap adapters.

What parts are included and why does each matter?

The kit has 28 pieces that provide broad compatibility and practical functionality: a hand pressure pump, multiple radiator adapters, two vacuum purge and refill tools, test cap adapters, and an adapter spanner. Each component lets you perform a specific test or fluid-change task without modifying the vehicle.

• Hand pressure pump — creates stable pressure to reveal leaks.
• Universal radiator adapters — fit many neck sizes and vehicle brands.
• Vacuum purge/refill tools — remove air and refill coolant cleanly.
• Radiator cap test adapters and spanner — validate cap seal performance.

Which vehicles and systems will this toolbox work with?

DAYUAN designed the adapter assortment to cover a wide range of passenger cars and light trucks including many European and Asian makes. The 0–35 psi capacity and varied fittings match most radiator necks, expansion tanks and pressure caps used by common manufacturers.

• Compatible with brands such as Mercedes-Benz, Audi, BMW and VW.
• Also works on Ford, Toyota, Chevrolet, Kia and many others.
• Fits both radiator necks and separate coolant reservoirs with proper adapter.

Who is this for?

This DAYUAN kit suits home mechanics, DIY car owners, mobile technicians and small repair shops that need a single, portable set for cooling-system diagnostics and coolant service. If you perform routine maintenance, diagnose intermittent coolant loss, or need to vacuum and refill systems without air pockets, this kit provides the adapters and tools to do those jobs efficiently.