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Counter TIps: Power Brake Boosters

Get All the Parts for the Job

  • Calipers (always replace in pairs)

  • Brake Fluid

  • Hose Clamps

  • Tools (vacuum gauge, deep sockets, wrenches, pliers, etc.)

  • In-line Filters

  • Master Cylinder

Symptoms of Booster Failure

  • Leaking air, venting vacuum 

  • Vacuum booster noise

  • Hard pedal 

  • Leaking brake fluid

Do the Job Right

Power Break Booster
  • Check brake pedal and master cylinder rod lengths. 
    Carefully match the original and replacement unit rod lengths. Adjust pedal and master cylinder rods, if possible, or reuse the master cylinder rod. If no adjustment or exchange is possible, do not install the replacement unit. All CARDONE loaded brake boosters are preadjusted and ready to be installed.

  • Check vacuum line for gas odor or the presence of moisture. 
    Gasoline or gas fumes can enter the booster through the vacuum line causing internal rubber components to deteriorate which leads to booster failure and voids unit warranty. Check PCV system and replace or repair system as necessary. Also check fuel system for rich operation.

  • Check in-line vacuum check valves and filters. 
    Be sure all valves operate and replace filters as necessary. Hydrovac systems use an in-line check valve that must be at least 10 inches above carburetor base. NEVER eliminate loops in vacuum line as these act as moisture and vapor traps.

  • Check for sufficient vacuum supply. 
    Use a gauge to measure available vacuum level and volume. For proper operation at least18 in.Hg. and strong vacuum draw must be available. Low vacuum levels could be caused by loose or defective engine components. Insufficient volume can be caused by a clogged intake manifold vacuum fitting.

  • Check outside of master cylinder piston for presence of brake fluid. 
    A defective push rod seal on the original unit has damaged the master cylinder piston seal. Failure to replace a leaking master cylinder will void booster warranty.

  • Follow CARDONE’s easy-to-read instructions. 
    Follow the step-by-step, fully-illustrated instructions included with every unit. ALSO follow any specific instructions provided by vehicle manufacturer.

Avoid Warranty Problems

    If unit has never been on car, return to store inventory (do not return to manufacturer). Signs to look for: 
    1. No brake fluid in unit 
    2. Installation kits unused 
    3. Unit very clean 
    4. No score marks on seats
    Signs of improper installation, mishandling and tampering by the installer include: 
    1. Swollen rubber components 
    2. Missing parts 
    3. Broken parts or castings 
    4. Stripped threads NOTE: Improper installation includes failure to bench bleed units.
    To qualify for possible warranty coverage, the unit must: 
    1. Have color code visible. 
    2. Show no signs of abuse.
    3. Appear to have been on car. 
    4. Have scored seats. 
    5. Have all parts returned.
    1. Warranty void if unit disassembled 
    2. Remind customer to always return cores in replacement part original packaging
    Do not accept unit for warranty if: 
    1. No color code visible 
    2. Unit is very rusty. 
    3. Unit has missing parts.

Use CARDONE Power Brake Boosters for Long Life & Proven Performance

  • Anti-corrosion premium coating

  • Bores fine-tuned to O.E. microfinish

  • Finest quality rubber components (EPDM classification)

  • Bleeder kits and essential hardware included

  • Stringent quality control in all stages of manufacturing

  • Complete easy-to-follow instructions included

View our monthly new part number releases of the latest domestic & import vehicles.

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