Checking Compression of All Cylinders (M60/M62/M73/S62/M54)

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





Special tools required:
- 11 0 224 11 0 220 Compression Test Kit
- 11 0 226 11 0 220 Compression Test Kit





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.





Important!
Check Schrader valve on special tool 11 0 226 11 0 220 Compression Test Kit for tight fit.

Screw special tool 11 0 226 11 0 220 Compression Test Kit by hand into spark plug thread and connect special tool 11 0 224 11 0 220 Compression Test Kit.

Note:
Check that sealing ring is in perfect condition (see arrow).





Depress accelerator and actuate starter until compression stops rising.

Compression pressure.





Assemble engine.

Now clear the fault memory.