Removal and Replacement

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





Special tools required:
- 11 2 250
- 11 4 471
- 11 4 472
- 11 9 590 11 9 590 Mandrel
- 11 9 630 11 9 630 Angle





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).





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





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 Replacing 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 Note:
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 shims with a magnet.

Illustration shows camshafts removed.





Use special tool 11 4 471 to remove coarse gasket remnants from sealing faces of cylinder head and 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 Service and Repair.





Important!
Fit new cylinder head screws.

Do not wash off bolt coating.

Attach shims to cylinder head bolts.

Shims can drop into the engine (risk of damage!).

Secure cylinder head bolts from inside outwards (1 to 10).

Tightening torque: 11 12 2AZ. Mechanical Specifications





Secure screws (1).

Tightening torque: 11 12 1AZ. Mechanical Specifications





Tighten bolt (1).

Tightening torque: 11 12 3AZ. Mechanical Specifications





Assemble engine.