Removing Cylinder Head
Removing cylinder headPreliminary work
Note: If more comprehensive work, e.g. replacement of the entire cylinder head, is intended, the exhaust manifolds must also be removed.
1. Remove engine.
2. Remove cover for camshaft housing.
3. Remove intake-air distributor.
4. Remove chain case lid.
5. Remove camshaft housing.
Information
Component overview
Removing cylinder head
1. Remove guide rail of timing chain -3-. To do this, unscrew fastening screws -4-.
2. Remove oil separator vent line from cylinder head. To do this, unscrew the fastening screws -3 and upper 4-.
3. Disconnect vent line for cylinder heads. To do this, press the ribbed surfaces of the buttons and pull off the plugs.
Note: In the case of the turbocharged engine (M48/50), only the upper fastening screws of the turbocharger need to be undone.
4. Uncover cable of oxygen sensor front catalytic converter.
5. Unscrew starter catalyst from exhaust manifold. To do this, loosen the 3 fastening nuts.
6. Unscrew fastening screws of cylinder head in the opposite order of the tightening sequence -figure-.
Illustration shows tightening sequence
7. Remove cylinder head and cylinder head gasket.