Harbor Freight Tools


Radiator Pressure Test Kit

This radiator pressure test kit delivers superior detection for testing automotive pressured cooling systems up to 30 PSI.

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Quickly pinpoint internal and external leaks with the MADDOX® Radiator Pressure Test Kit. With full range of adapters this kit detects even small leaks in automotive pressurized cooling systems up to 30 PSI. Includes 4 radiator cap adapters and works with most cars and light trucks.

  • Durable, heavy-duty construction designed to provide superior detection
  • For testing automotive pressurized cooling systems up to 30 PSI
  • Thumb operated pressure relief valve
  • Works with most cars & light trucks - universal adapter set available separately for expanded vehicle coverage
  • Heavy duty blow mold case

Radiator pump, 4 radiator cap adapters, hose, 19/16 in. x 1/4 in. rubber spacer and manual
Coolant system bottles, radiators, and caps
Hose Length
14 in.
Maximum pressure (PSI)
30 PSI
Shipping Weight
5.34 lb.
CA Residents
Warning - Prop 65 Info
Note: Specifications are approximate and subject to change

We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. Limitations apply.