11 00 039 Checking compression of all cylinders (N55)

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2015 BMW 740i, 2015 BMW 740Li xDrive, 2015 BMW 740Li, 2014 BMW 740i, and 2014 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

WARNING:

Dangerous voltage.

Interrupt power supply to ignition coils.

Necessary preliminary work:

Remove SPARK PLUGS .

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

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

Fig 1: Identifying Special Tool (11 0 222) Tip

G11165201

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Special Tools

G11165202

Courtesy of BMW OF NORTH AMERICA, INC.

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

WARNING: Oil thread on special tool 11 8 731 .

Fig 3: Installing Special Tools (11 0 222) And (11 8 731)

G11165203

Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 11 0 222 by hand into spark plug thread and connect special tool 11 0 224 .

Depress accelerator pedal and actuate starter until compression pressure stops rising.

NOMINAL VALUES , compression pressure

Fig 4: Installing Special Tool (11 0 222) Into Spark Plug Thread

G11165204

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine

Delete fault memory.