Hydraulic System: Testing and Inspection

Pressurized leak test

Special Tools and Equipment





< VAG1310A brake pressure gauge 0.250 bar

Before beginning
Check brake system (hydraulic unit, brake hoses, brake lines and brake calipers) for function and proper sealing (must be free of leaks).
- Remove bleeder screw at one front brake caliper. Connect VAG1310 or VAG1310 a brake pressure gauge and bleed.
- Insert brake pedal depressor between brake pedal and driver's seat. Apply pressure to brake pedal until gauge indicates positive pressure of 50 bar (725 psi). Pressure must not drop by more than 4 bar (58 psi) during test period of 45 seconds. If drop in pressure exceeds specification: replace master cylinder.