High Pressure Leak Test

2013 Mini Cooper Countryman, Standard TransSECTION High Pressure Leak Test
WARNING: This page is about a different car, the 2003 BMW Z8 and 2002 BMW Z8. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check brake system for proper operation and leaks. Remove front wheel and caliper bleeder screw. Attach Pressure Tester (32-4-000) to one side of brake circuit.
  2. With engine off, apply about 150 lbs. (67 kg) of pressure to brake pedal.
  3. Hydraulic line pressure should increase to 710 psi (50 kg/cm2 ). After 2 minutes, pressure should not drop more than 57 psi (4 kg/cm2 ). Repeat test on other side of brake circuit.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.