DAYUAN Radiator Pressure Tester Kit 28‑pc – Universal adapters, 0–35 psi pump & vacuum purge

DAYUAN 28-piece Universal Radiator Pressure Tester Kit is a complete hand-pump and adapter set designed to test cooling-system pressure, find leaks, and vacuum-purge and refill coolant safely.

Keep your vehicle's cooling loop reliable by checking caps, hoses, and connections for pressure loss without guessing. This kit combines a manual pressure pump, a wide selection of radiator adapters and caps, plus vacuum purge and refill fittings so you can diagnose leaks and replace coolant faster than trial-and-error methods. The components cover most European, Asian, and American makes, and the pressure gauge range matches common radiator specifications for consumer cars and light trucks.

How will this kit help me locate coolant leaks?

By connecting the correct adapter to the radiator neck or expansion tank and applying controlled pressure with the hand pump, you can reveal drops in pressure or visible seepage that indicate a leak. The gauge shows any pressure loss over several minutes so you can target the faulty area rather than disassembling components at random.

• Manual pump with built-in gauge reads 0–35 psi for common automotive systems
• Multiple radiator cap adapters and chromed steel fittings for secure seals
• Color-coded test caps speed up adapter selection
• Vacuum purge fittings let you inspect hoses and clamp joints under pressure

Can I use this kit to remove air and refill coolant?

Yes — the kit includes vacuum purge and refill tools that attach to the cooling system to evacuate air pockets and introduce fresh coolant, helping prevent overheating and hot spots caused by trapped air. The specialized connection design improves flow control during filling so you can restore the system cleanly.

• Two vacuum purge and refill fittings for flexible operation
• Adapter spanner helps tighten and remove radiator caps without damage
• Controlled hand pump minimizes splashes while refilling
• Works with both radiator necks and overflow tanks where applicable

Which vehicles and parts does the DAYUAN kit fit?

The set is engineered to be broadly compatible with many passenger cars and light trucks from major manufacturers. With 28 pieces including 17 common adapters and several universal fittings, the kit addresses the majority of radiator openings and service ports encountered in routine maintenance and diagnostics.

• Adapters cover brands such as Mercedes-Benz, Audi, BMW, VW, Toyota and more
• Three chromed steel adapters for robust, corrosion-resistant connections
• Two radiator cap test adapters for standard cap sizes and styles
• Universal radiator adapters to bridge uncommon necks and expansion tanks

What should I expect while using the kit safely?

Always work with a cool engine and follow manufacturer service procedures for pressurizing the cooling system. The hand pump provides incremental pressure so you can test gradually and watch the gauge; never exceed manufacturer-specified cap or system pressures.

• Test on a cooled system to avoid hot coolant hazards
• Monitor the gauge and stop if pressure climbs unexpectedly
• Use the adapter spanner to prevent cap or neck damage
• Keep replacement coolant and proper disposal methods ready

Who is this for: The DAYUAN 28-piece kit suits DIY mechanics, professional technicians, and fleet maintainers who need an affordable, all-in-one toolset for cooling-system troubleshooting. If you regularly service cars from European, Asian, or American marques, or simply want a reliable way to spot coolant leaks and purge air before topping off, this kit provides the adapters and pump to diagnose and service most passenger vehicles efficiently.