505818 - 1016E38 Single CYLINDER HEAD or (one), left or right, removed - Reface

- Check that the planarity of the lower cylinder head plane corresponds to the recommended values.

	Subject	Value
.	Engine cylinder head	mm
-	Lower plane planarity	0.1

- If the planarity of the lower cylinder head plane does not correspond to the recommended figures, regrind it without exceeding the minimum permitted height.

	Subject	Value
.	Engine cylinder head	mm
-	Minimum permitted height after regrinding	140,85

- After the cylinder head has been refaced, check that the volume of the combustion chamber (with the valves and spark plugs fitted temporarily) is within the recommended values.

	Subject	Value
.	Engine cylinder head	c.c.
-	Combustion chamber volume	51.486

- If the volume of the combustion chamber does not correspond to the recommended values, remove material from inside the combustion chamber at the points shown by the arrows.