11 00 039 Checking compression of all cylinders (M60 / M62 / M73 / S62 / M54)

WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see SPECIAL TOOLS - Z3 .

Special Tools Required:

11 0 224
11 0 226

Important!

High tension - mortal danger!

Cut off power supply to ignition coils (disconnect plug connection at DME control unit).

Necessary Preliminary Tasks:

Connect charger or a second battery.
Read out fault memory of DME control unit
Pull fuel pump relay or fuel pump fuse.
Start engine and allow residual fuel to drain out (pressure reduction).
Remove all spark plugs. Refer to 12 12 011 REPLACING ALL SPARK PLUGS .

Important!

Check Schrader valve on special tool 11 0 226 for tight fit.

Screw special tool 11 0 226 by hand into spark plug thread and connect special tool 11 0 224.

NOTE: Check that sealing ring is in perfect condition.

Fig 1: Identifying Special Tool 11 0 226 Sealing Ring Location

Courtesy of BMW OF NORTH AMERICA, INC.

Depress accelerator and actuate starter until compression stops rising.

Compression pressure.

Fig 2: Measuring Compression By Using Special Tool 11 0 226 And Special Tool 11 0 224

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Now clear the fault memory.