Removal and Replacement

11 12 100 Removing and installing/sealing cylinder head (N14)

Special tools required:







IMPORTANT:
Fit new cylinder head screws.
Do not wash off bolt coating.
There must not be any coolant, water or oil present in the pocket holes (risk of corrosion and cracking) .







IMPORTANT:
Different cylinder heads installed.
Build date up to 03.2009:
Cylinder head with cast no. up to V7553471080- 15 (BMW 7534708)
Build date from 03.2009:
Cylinder head with cast no. from V7553471080-1 6 (BMW 7577371)

When installing new injectors or cylinder heads, identification of the cylinder head's model is mandatory (fire hazard).







Necessary preliminary tasks:
- Remove exhaust system .
- Drain coolant .
- Drain engine oil .
- Remove intake air manifold .
- Remove oil dipstick .
- Detach all coolant hoses from engine.
- Remove oil dipstick guide tube .
- Remove cylinder head cover .
- Remove solenoid valve from adjustment unit.
- Remove inlet adjustment unit .







Secure crankshaft with special tool 11 9 590 .







NOTE: Remove and install cylinder head in installed state.

Suspend engine with engine crane (1) from lifting eye (2).







NOTE:
Remove and install cylinder head in installed state.
Move front panel into assembly position .

Release upper alternator screws , do not remove alternator.
Remove right engine mount .
Secure special tool 11 9 630 with standard bolts (1 and 2).







Release screws (1).

IMPORTANT:
If the timing chain is stowed in the gearcase, the crankshaft must no longer be rotated.
The timing chain may jam on the crankshaft gear.

Installation:
Only during assembly is the timing chain lifted out with a hook.







Release screw (1).







Release cylinder head bolts with special tool 11 2 250 .
Release cylinder head bolts from outside inwards (10 to 1).

NOTE:
Remove washers with a magnet.
Graphic shows camshafts removed.







Use special tool 11 4 471 to remove coarse gasket remnants from sealing surfaces on cylinder head and on crankcase.

IMPORTANT: Do not use any metal-cutting tools.







Remove fine gasket remnants with special tool 11 4 472 .

IMPORTANT: Do not use any metal-cutting tools.

There must not be any coolant, water or oil present in the pocket holes (risk of corrosion and cracking) .
Clean all pocket holes.
Replace cylinder head gasket .







IMPORTANT:
Fit new cylinder head screws.
Do not wash off bolt coating.
Attach washers to cylinder head bolts.
Washers can drop into the engine (risk of damage.) .

Secure cylinder head bolts from inside outwards (1 to 10).
Tightening torque: 11 12 2AZ.







Secure screws (1).
Tightening torque: 11 12 1AZ.







Tighten bolt (1).
Tightening torque: 11 12 3AZ.







Assemble engine.