Special tools required
Note. For illustration of Special Tools, refer to ENGINE- SPECIAL TOOLS article.
- 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.
| 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 (see arrow in illustration).
Scheme 552
Depress accelerator and actuate starter until compression stops rising.
Compression pressure.
Scheme 553
Assemble engine.
Now clear the fault memory.
- 11 2 470
- 11 9 500
(engine removed)
- 00 9 250
- 11 2 300
- 11 2 441
- 11 2 442
- 11 2 443
- 11 2 444
- 11 2 445
- 11 2 446
- 11 4 230
- 11 4 231
- 11 4 232
- 11 5 180
- 11 6 440
- 11 6 450
- 11 6 451
- 11 6 452
- 11 7 380
Remove intake filter housing with air-mass flow sensor.
Remove fan impeller with fan clutch and fan cowl.
Remove both cylinder head covers.
Remove spark plugs.
Note. In firing TDC position, the inlet camshaft 1 to 4 rotates in the teeth of the camshaft adjustment unit.
Scheme 554
| CAUTION | This twisting is caused by the position of the cams and is not an indication for incorrect timing. |
Remove oil lines on left and right of cylinder head.
Scheme 555
Turn engine in direction of rotation as far as TDC firing position of first cylinder.
Scheme 556
- 11 2 300
- 11 2 442
- 11 2 443
- 11 2 444
- 11 2 446
- 11 5 180
(if necessary inlet or exhaust side)
Cylinder bank 5 to 8
Unscrew and remove splash guard.
Remove both cylinder head covers.
Remove all spark plugs.
- 11 2 300
- 11 2 441
- 11 2 443
- 11 2 444
- 11 2 445
- 11 5 180
(if necessary inlet or exhaust side)
Cylinder bank 1 to 4
Unscrew and remove splash guard.
Remove both cylinder head covers.
Remove all spark plugs.
- 00 9 250
- 11 2 300
- 11 2 441
- 11 2 442
- 11 2 443
- 11 2 444
- 11 2 445
- 11 2 446
- 11 4 230
- 11 4 231
- 11 4 232
- 11 5 180
- 11 6 440
- 11 6 450
- 11 6 451
- 11 6 452
- 11 7 380
- 00 9 250
- 11 2 300
- 11 2 441
- 11 2 442
- 11 2 443
- 11 2 444
- 11 2 445
- 11 2 446
- 11 4 230
- 11 4 231
- 11 4 232
- 11 5 180
- 11 6 440
- 11 6 450
- 11 6 451
- 11 6 452
- 11 7 380
Remove intake filter housing with air-mass flow sensor.
Remove fan impeller with fan clutch and fan cowl.
Remove both cylinder head covers.
Remove spark plugs.
Note. In firing TDC position, the inlet camshaft 1 to 4 rotates in the teeth of the camshaft adjustment unit.
| CAUTION | This twisting is caused by the position of the cams and is not an indication for incorrect timing. |
Scheme 557
Remove oil lines on left and right of cylinder head.
Scheme 558
Turn engine in direction of rotation as far as TDC firing position of first cylinder.
Scheme 559
- 00 9 250
- 11 2 300
- 11 2 441
- 11 2 442
- 11 2 443
- 11 2 444
- 11 2 445
- 11 2 446
- 11 3 310
- 11 4 230
- 11 4 231
- 11 4 232
- 11 5 180
- 11 6 440
- 11 6 450
- 11 6 451
- 11 6 452
- 11 7 380
Remove intake filter housing with air-mass flow sensor.
Remove fan impeller with fan clutch and fan cowl.
Remove both cylinder head covers.
Remove spark plugs.
Note. In firing TDC position, the inlet camshaft 1 to 4 rotates in the teeth of the camshaft adjustment unit.
| CAUTION | This twisting is caused by the position of the cams and is not an indication for incorrect timing. |
Scheme 560
- 00 9 250
- 11 2 300
- 11 2 441
- 11 2 442
- 11 2 443
- 11 2 444
- 11 2 445
- 11 2 446
- 11 3 310
- 11 4 230
- 11 4 231
- 11 4 232
- 11 5 180
- 11 6 440
- 11 6 450
- 11 6 451
- 11 6 452
- 11 7 380
Remove intake filter housing with air-mass flow sensor.
Remove fan impeller with fan clutch and fan cowl.
Remove both cylinder head covers.
Remove spark plugs.
Note. In firing TDC position, the inlet camshaft 1 to 4 rotates in the teeth of the camshaft adjustment unit.
| CAUTION | This twisting is caused by the position of the cams and is not an indication for incorrect timing. |
Scheme 561
- 11 4 050
- 13 3 061
- 13 3 063
- 13 6 051
- 13 6 054
Note. For engine oil pressure to be checked, oil pressure switch must be removed and special tools must be installed and connected.
To avoid an excess discharge of oil when removing oil pressure switch
Unscrew oil filter cap; the engine oil flows out of the oil filter housing into the oil sump.
Installation
Replace sealing ring.
Tightening torque, refer to 11 42 2AZ OIL FILTER AND LINES
Remove oil pressure switch.
Installation
Tightening torque 12 61 1AZ
Install special tool 11 4 050 with sealing ring (1) in place of oil pressure switch.
