Front Brake Hose — Replacement (BMW 7 Series E32)

Caution: Brake hoses must not come into contact with engine oil or gasoline, and must not be painted or treated with underbody protection.

Removal

Mark the position of the front wheels on the hubs so that you can then install the balanced wheels in their original positions. Loosen and support the car from the front and remove the front wheels.

Lightly press the brake pedal and secure it in this position. To do this, insert a spacer between the pedal and the driver's seat. If necessary, move the seat forward or backward. This will prevent the brake fluid from leaking out of the reservoir after disconnecting the brake pipes and air from entering the brake hydraulic system.



Unscrew the union nut of the brake pipe from the brake hose. While doing this, hold the brake hose by the flats or by the hexagon so that the connection does not turn in the mount.

Note: This may cause some brake fluid to spill out, which should be collected in a suitable container.

Unscrew the brake hose from the brake caliper.

Installation

Screw the brake hose onto the caliper.

Place the wheels in a straight-ahead position.

Insert the brake hose into the holder and screw the union nut of the brake pipe into it, securing the pipe. At the same time, hold the brake hose by the flats or by the hexagon so that it does not turn in the connection. The tightening torque for nuts with M12 thread is 15 Nm, with M10 thread - 20 Nm.



Install the front wheels according to the marks made during removal. Do not lubricate the wheel bolts. Tighten the wheel bolts.

After installation on an unloaded wheel (the car is lifted) check that the brake hose follows all wheel movements when turning and does not rub against other parts.

Lower the vehicle and tighten the wheel bolts crosswise to 100 Nm.

Turn the steering wheel left and right until it stops and, with the vehicle standing on its wheels, check whether the hose follows all the movements of the wheel and does not rub against other parts.

Bleed the brakes.