Identifying and troubleshooting brake system faults (Opel Omega B2)

Too much free travel of the brake pedal

Partial or complete wear of brake linings

• Replace the brake pads

Failure of one of the brake circuits

• Check the brake circuits for brake fluid leaks

The brake pedal is pressed down far and springs

Air in the brake system

• Remove air from the brake actuator

Too little brake fluid in the expansion tank

• Add brake fluid, bleed the brakes

Formation of steam bubbles

• Most often after a heavy load on the brakes, for example, during a steep descent

The braking effect is reduced, the brake pedal is pressed to the stop

Leaky pipeline

• Tighten the nuts at the connection points or replace the pipeline

Damaged seal on the master cylinder or wheel cylinder

• Renew the seal. In the master cylinder, replace the internal parts, if necessary, replace the master cylinder

Poor braking action despite high force applied to the brake pedal

Oily brake pads

• Update your overlays

Incorrect or hardened brake lining

• Update your pads, use only original pads from the vehicle manufacturer

The brake booster is faulty, the booster hose is defective and porous

• Check the booster and booster hose

The brake pads are worn out

• Replace the pads

The brake mechanisms of the wheels do not act simultaneously (the brakes "pull" in one direction)

Tire pressure is not as prescribed

• Check the tire pressure and bring it to normal

Uneven tire wear

• Replace worn tires

Oily brake pads

• Update your overlays

Brake linings of different brands are installed on one bridge

• Replace the pads, use only the original pads from the vehicle manufacturer

Poor condition of the working surface of the brake lining

• Replace the pads

Contaminated caliper cavities

• Clean the seating and guide surfaces of the brake pads of the caliper

Wheel cylinder corrosion

• Replace the brake caliper

Uneven wear of brake lining

• Update your brake pads (both wheels) and check the caliper stroke

The brakes work by themselves

The equalizing hole in the master brake cylinder is clogged

• Clean the cylinder and replace its internal parts in a workshop

The clearance between the pushrod and the piston of the master brake cylinder is too small

• Check the gap

Brakes heating up while driving

The equalizing hole in the master brake cylinder is clogged

• Clean the master cylinder and replace its internal parts at a workshop

Heavy brake action

• Lubricate the moving parts of the drum brake. Overhaul the caliper (in the workshop)

Brake rattling

Incorrect brake pads

• Replace the pads. Use only the original pads from the vehicle manufacturer

(Material copied from this website: «www.OPELBOOK.ru»)

The brake disc is covered with corrosion in places

• Clean the disk thoroughly

The brake disc has lateral runout

• Modify the disk or replace it

Brake pads do not come off the brake disc

Wheel cylinder corrosion

• Overhaul the caliper, replace if necessary

Uneven wear of the linings

Incorrect brake pads

• Replace the pads. Use only the original pads from the vehicle manufacturer

The caliper is dirty

• Clean the caliper cavities

Heavy stroke of wheel cylinder pistons

• Develop pistons

Brake system leak

• Check the tightness of the brake system

Wedge-shaped wear of brake linings

The brake disc does not rotate parallel to the caliper

• Check the caliper mating surface

Caliper corrosion

• Eliminate corrosion and contamination of calipers

Squeaking brakes

Often attributed to atmospheric influences (humidity)

• No intervention is required if the brake squeak occurs after a long period of parking in high humidity, but does not recur after the first braking

Incorrect brake pads

• Replace the pads. Use only the original pads from the vehicle manufacturer

The brake disc does not rotate parallel to the caliper

• Check the caliper mating surface

The caliper cavities are dirty

• Clean the caliper cavities

Brake pulsation

ABS action

• Normal phenomenon, no intervention required

Lateral runout of the brake disc or too large tolerance on the thickness of the disc

• Check the runout and thickness tolerance of the disc. Rework or replace the disc

The brake disc does not rotate parallel to the caliper

• Check the caliper mating surface

ABS warning light comes on while driving

Low battery power (voltage less than 10 volts)

• Check the battery voltage. Make sure that the battery charge light goes out after the engine starts. Otherwise, check the condition of the V-belt and the alternator
• Review the recommendations regarding the active safety systems of the vehicle Check the terminal of the ground (-) wire from the return pump of the hydraulic unit and make sure that it is securely fastened and not rusted

ABS malfunction

• Contact a workshop to check the ABS