Checking compression of all cylinders (S55 Engine) (2019-2022)

Special tools required:

IMPORTANT: High tension - mortal danger!

Interrupt voltage supply to ignition coils.

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew tip (1) from special tool 11 0 222.

IMPORTANT: Then check the Schrader valve that is now visible for secure seating.

Prepare special tool 11 0 222 in conjunction with 11 8 732 and 11 8 731.

Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 11 0 222 into special tool 11 8 731 to 10 Nm.

IMPORTANT: Oil thread on special tool 11 8 731.

Courtesy of BMW OF NORTH AMERICA, INC.

Connect special tool 11 0 222 to 13 6 052 and 11 4310.

Tightening torque: 8 Nm.

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in pressure sensor 81 38 0 431 592 manually with special tool 11 4 310.

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on compressor outlet, cylinder 1 3.

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on compressor outlet, cylinder 4- 6.

Courtesy of BMW OF NORTH AMERICA, INC.

Release hose clips (1 and 2).

Pull off pressure pipe (3).

Disengage cable from holder (4).

Pull off pressure pipe (5).

Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary work:

Screw prepared special tools (1) into cylinders according to diagnosis information.

Courtesy of BMW OF NORTH AMERICA, INC.

Compression check, electronic.

Connect ISID and IMIB (Integrated Measurement Interface Box) (1).

Follow diagnosis instruction.

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Clear diagnostic fault entries from fault memory.