Cylinder head (page 8 of 8)

1. Slacken the fastening screws and remove the tappet cover complete with seals.
2. Slacken the screws fastening the pressure pump support to the air intake box.
3. Slacken the fastening screws and remove the cylinder head.
4. Remove the cylinder head seal.

• Strip down and overhaul the cylinder head proceeding as described in the "ENGINE OVERHAULING" volume.

Refit the cylinder head reversing the sequence followed for removal and following the instructions given below.

• Fit a new cylinder head seal on the crankcase making sure that it is of the same thickness as the one removed.

NOTE: The cylinder head seal is of the ASTADUR type. Because of the special compound with which the seal is made it undergoes a polymerising process when the engine is running so that it hardens considerably during use.. To ensure that the seal polymerises it is necessary to:

• keep the seal closed in its nylon bag;
• take the seal out of the bag only shortly before assembly;
• do not lubricate or dirty the seal with oil.

• Place the cylinder head on the crankcase.
• Tighten the cylinder head fastening screws, proceeding as described below and bearing in mind that the tightening sequence for each step is the one illustrated.

NOTE: For angle tightening use goniometer no. 1.860.942.000 as illustrated.

65 Nm
6.6 kgm

Tightening procedure

For refitting the camshaft drive belt and its timing and for fitting the engine components belt see GROUP 00.