Brake system specifications (Opel Vectra A)

System type

Models without ABS:

• Models 1.4, 1.6 and 1.8 l — Hydraulic, with two diagonal circuits and a vacuum booster, pressure control valves are installed in the rear part of the circuits. Front disc brakes, rear drum brakes. A handbrake, controlled by a cable, is installed on the rear wheels.
• 2.0 l models - Hydraulic, with two diagonal circuits and a vacuum booster, pressure control valves are installed in the rear part of the circuits. Front and rear disc brakes. A handbrake, controlled by a cable, is installed on the rear wheels.
• All models with anti-lock braking system (ABS) - Hydraulic, with two parallel circuits (front and back) and a vacuum booster operating via a hydraulic modulator, pressure control valves are installed in the rear circuit. Front and rear disc brakes. A cable-controlled handbrake is installed on the rear wheels.

Front brake discs

Type:

• Models 1.4, 1.6 and 1.8 l - Solid or ventilated (since October 1991.)
• 2.0L Models - Ventilated

Diameter:

• Models 1.4, 1.6 and early 1.8 l - 236 mm
• Late models 1.8L (since October 1991.) and 2.0 l models - 256 mm

Maximum disc runout (all models) — 0.1 mm

Minimum brake pad thickness (including metal base):

• All models - 7.0 mm

Minimum disc thickness after resharpening: *

• Models 1.4, 1.6 and 1.8 l (with solid disks) — 10.7 mm
• Models 1.4, 1.6 and 1.8 l (with ventilated discs) — 18.0 mm
• 2.0L models - 22.0mm

*Once this thickness is reached, only one more set of brake pads can be used, then the discs must be replaced

Rear brake discs

Type (all models) — Solid

Diameter (all models) — 260 mm

Maximum disc runout(all models) — 0.1 mm

Minimum brake pad thickness (including metal base):

• All models - 7.0 mm

Minimum disc thickness after resharpening (all models)* — 8.0 mm

*Once this thickness is reached, only one more set of brake pads can be used, then the discs must be replaced.

Minimum thickness of brake lining of handbrake shoe (only overlay).

• All models - 1.0 mm

Rear brake drums

• Inner diameter (all models) — 200 mm
• Minimum brake pad thickness (all models) — 0.5 mm above the rivet heads.

Brake fluid type/specification

All models - See item "Lubricants and fluids" in the Chapter "Weekly Checks".

Tightening torques, Nm

ABS hydraulic modulator mount - 8

Mounting the ABS sensor on the car wheel - 8

ABS control unit - 1.5

Brake system tube couplings - 16

Brake cylinder support and bleed nipples - 9

Front brake disc mounting screw - 4

Brake hydraulic drive to the front brake caliper coupling - 40

Front Brake Caliper Bracket to Steering Knuckle - 95

Front Brake Caliper Guide - 30

Front Brake Caliper Mount (solid wheel models) — 95

Front Brake Caliper to Mounting Bracket (models with ventilated discs) — 30

Handbrake lever - 20

Master Cylinder Mount - 22

Master Cylinder Lock Screw (ATE Type) - 6

Pressure regulating valve to master cylinder:

• Type ATE - 12
• GMF type - 40

Rear Brake/Steering Knuckle Backplate Spring:

• Stage 1 - 50
• Stage 2 - Turn another 30°
• Stage 3 - Turn another 15°

Rear brake disc mounting screw - 8

Rear Disc Brake Caliper Mount - 80



Rear brake drum mounting screw - 4

Rear Wheel Brake Cylinder Mount - 9

Vacuum booster bracket to bulkhead - 22

Vacuum booster to bracket - 20