GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Riviera 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Vacuum Brake Booster Replacement

Removal Procedure

    Important: The booster can be removed from the vehicle without disconnecting the hydraulic line. However, if both the booster and the master cylinder are to be removed, remove the master cylinder first; refer to Master Cylinder Replacement .

  1. Remove the booster vacuum hose from the vacuum check valve.

    2. Object Number: 177410 Size: SH
  2. Remove the master cylinder attaching nuts.
  3. Remove the master cylinder from the booster. Move the master cylinder forward just enough to clear the studs on the booster. This will flex the brake pipes slightly. It's important to be careful not to bend or distort the pipes.
  4. Remove the acoustical barrier from the booster studs (under I/P).

    5. Object Number: 106322 Size: SH
  5. Remove the booster attaching nuts.
  6. Remove the booster pushrod from the brake pedal. Tilt the entire booster slightly to work pushrod off the pedal clevis pin without putting undue side pressure on the pushrod.
  7. Remove the booster from the vehicle.
  8. Remove the gasket.

Installation Procedure
  1. Install the gasket to booster.

    2. Object Number: 106322 Size: SH
  2. Install the booster to the vehicle.

    3. Object Number: 106324 Size: SH
  3. Install the booster pushrod from the brake pedal. Tilt the entire booster slightly to work pushrod onto the pedal clevis pin without putting undue side pressure on the pushrod.
  4. Install the booster attaching nuts.
  5. Install the acoustical barrier to the booster studs (under I/P).

    6. Object Number: 177410 Size: SH
  6. Install the master cylinder onto the booster
  7. Install the master cylinder attaching nuts.

    8. Tighten
    Tighten the nuts to 27 N·m (20 lb ft).

  8. Install the booster vacuum hose from the vacuum check valve.