Check for leaks before you refill the cooling system
Coolant level keeps dropping? Just replaced a water pump, radiator, or hose? This 27-piece kit gives you three tools for the job: a hand pump to pressure-test the system, connectors to test the radiator cap separately, and a vacuum tool to refill the system after service.
1. Pressure-test the cooling system
Fit the matching adapter to the radiator or pressurized expansion tank. Use the hand pump and gauge to bring the system to the vehicle manufacturer’s specified test pressure. Watch the gauge and inspect accessible hoses, fittings, and seams for seepage. If pressure falls without an obvious external leak, check the adapter seal and continue diagnosis using the vehicle’s service procedure.
2. Test the radiator cap on its own
Use the matching cap-test connector to attach a compatible cap to the hand pump. Testing the cap separately helps you check whether it holds its specified pressure before moving on to the rest of the system.
3. Vacuum-purge and refill after service
Connect the separate refill tool to a compressed-air supply to draw air from the drained cooling system. The vacuum then draws fresh coolant through the refill hose, helping reduce trapped air. After filling, verify the coolant level and follow the vehicle’s final bleed and level-check procedure.
What’s in the blow-molded case
- Hand pressure pump with a 0–35 PSI gauge, hose, and quick coupler
- 19 numbered adapters: steel #2–#4 and aluminum #6–#17, #19, and #21–#23
- Two radiator cap test connectors: blue R123/R125 and black R123/R124
- Vacuum purge and refill tool, coolant hoses, and universal rubber radiator adapter
- Needle thermometer and molded storage case
Fit and setup FAQ
Will it fit my vehicle?
Match the adapter to your vehicle’s radiator or pressurized expansion-tank opening. Check the year, make, model, and filler-neck or cap style before ordering.
Do I need an air compressor?
The hand pump operates manually for pressure and cap testing. The vacuum purge and refill tool requires an external compressed-air supply.
What pressure should I test at?
Follow the vehicle manufacturer’s specified test pressure. The 0–35 PSI figure is the gauge range. Start with a cool, depressurized system and release test pressure before disconnecting the tool.