SIXIWANZI Coolant Pressure Tester Kit — 18‑Cap Radiator Leak Detector with Hand Pump & Coolant Refill

The SIXIWANZI Coolant Pressure Tester Kit is a complete radiator leak detection and coolant servicing system that pressurizes, diagnoses, and helps refill cooling systems to find leaks fast.

Designed for both DIY mechanics and professional technicians, this all-in-one kit bundles a durable pressure pump, coolant replacement tools, and 18 color-coded radiator caps to fit most passenger vehicles. Built from high-strength materials like POM, rubber, and nylon, the set simplifies routine cooling-system checks by letting you pressurize the system, locate external leaks, remove trapped air, and refill coolant without repeated spills.

How does the tester identify radiator and cooling-system leaks?

The hand-operated pump pressurizes the cooling circuit to reveal leaks that only appear under pressure. By holding a set pressure while you inspect hoses, radiator seams, water pump, and heater hoses, the kit makes small weeps and loose clamps visible.

• Manual pump with pressure gauge for controlled pressurization
• Color-coded test caps match radiator necks and overflow reservoirs
• Stable hold of test pressure to confirm or rule out slow leaks

Can I use this kit to replace coolant and purge air pockets?

Yes — the included coolant replacement adapter and hoses let you drain and refill the system while minimizing spilled fluid. The kit supports bleeding trapped air so the engine gets a consistent coolant flow, which helps restore correct temperature regulation once reinstalled.

• Coolant replacement fittings connect to radiator or reservoir for cleaner refills
• Air-bleeding procedure reduces the risk of hot spots caused by trapped air
• Clear hoses let you monitor flow and fluid clarity during service

Which vehicles and situations is the SIXIWANZI kit compatible with?

The kit includes 18 different, color-coded caps and adapters to fit a wide variety of radiator necks, overflow bottles, and cooling-system geometries found on most cars and light trucks. It’s ideal for seasonal maintenance checks, diagnosing intermittent leaks, and preparing a vehicle for long trips.

• 18 caps adapt to common radiator and reservoir openings
• Suitable for cars, light trucks, and many European and Asian models
• Handy for pre-sale inspections, routine maintenance, or roadside troubleshooting

How durable and portable is this radiator pressure tester?

Components are molded from resilient polyoxymethylene, rubber, and tough nylon to resist chemicals, wear, and repeated use. The blow-molded carrying case keeps everything organized and protected so you can move the kit between shops or stow it in a trunk for emergency use.

• POM construction resists coolant and workshop solvents
• Rubber seals provide reliable pressure retention over repeated tests
• Thick, molded case organizes caps, hoses, and pump for transport

Who is this for? The SIXIWANZI Coolant Pressure Tester Kit is aimed at home mechanics, fleet technicians, and small repair shops that need a single, reliable toolset to diagnose and service cooling systems. If you perform routine coolant changes, hunt down intermittent radiator or hose leaks, or want a cleaner way to bleed and refill systems, this kit supplies the caps, adapters, and pump to get the job done without improvising. SIXIWANZI also backs the set with customer support should you need fitment advice or replacement parts.