Mastercool
Mastercool 43301 27 Piece Radiator Pressure Test Kit
Tests cooling systems to 35 psi with a hand pump, thermometer, vacuum purge tool and 27 adapters for domestic and import vehicles
- Find external coolant leaks fast with a 0–35 psi hand pump
- Spot blown head gaskets or cracked blocks through internal pressure testing
- Cover most domestic and import vehicles using 19 numbered adapters
- Purge air and refill coolant quickly with the vacuum tool
- Monitor system temperature accurately with the included thermometer
Radiator Pressure Test Kit 43301
This 27 piece Mastercool kit detects external cooling system leaks and internal engine leaks caused by blown gaskets or cracked blocks. It includes a hand pump, thermometer, vacuum purge and refill tool, universal radiator cap, coolant hose and installation accessories for comprehensive system analysis.
Installation uses 19 numbered adapters
Adapters numbered 2 through 21 cover most popular domestic and import cars and trucks. The blue R123/R125 and black R123/R124 connectors attach to the radiator cap for pressure testing. Hand pump operation is manual; ensure all connections are tight before pressurising to avoid false readings or coolant spray.
Verify adapter numbers match your vehicle before
The kit supplies adapters 2, 3, 4, 6 through 21; adapter 5 and sizes above 21 are not included. Confirm your radiator cap thread matches the R123/R124 or R123/R125 connectors. The test range tops out at 35 psi, so systems requiring higher pressure cannot be tested with this kit.
Highlights
- Find external coolant leaks fast with a 0–35 psi hand pump
- Spot blown head gaskets or cracked blocks through internal pressure testing
- Cover most domestic and import vehicles using 19 numbered adapters
- Purge air and refill coolant quickly with the vacuum tool
- Monitor system temperature accurately with the included thermometer
Specifications
No published specifications for this item yet.
Questions about this item
How can I confirm the Mastercool 43301 kit is working correctly after connecting an adapter?
Pressurise the cooling system with the hand pump and watch the gauge hold steady up to 35 psi; a stable reading shows the pump, gauge and adapter are sealing properly.
What components are included in the 27-piece kit and is anything else required?
The kit supplies a hand pump, thermometer, universal radiator cap, blue R123/R125 connector, black R123/R124 connector, vacuum purge and refill tool, coolant hose, plus 19 numbered adapters from 2 to 21; no extra parts are needed for pressure testing.
Which adapter from the numbered set should I select for my vehicle?
Choose the adapter that matches your radiator or header tank neck; the kit covers sizes 2 through 21 to fit most domestic and import cars and trucks.
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