Technical data

C
ylinder Head / Cylinder
Remove Unusability of cylinder head/cylinder
Detach Cylinder head, cylinder
7
Remove cylinder head and pull off cylinder (12) The cylinder head is unusable in the following
cases:
- Sealing surface fouled or damaged i.e. uneven
- Clean the sealing surface and re-grind,
observing the tolerances
- Valve seats worn out or no longer suitable for
re-facing.
- Cracks in the valve seats in the cylinder head
NOTE
Measure cylinder bore with a cylinder indicator
In the following cases, the cylinder is unusable:
- Seize marks are found in the bore
- Scratches are present
- Wear exceeds 0.15 mm
Repair Data Cylinder
Cylinder Dimension
D7 nominal
values
Max. allowable
wear (mm)
Remarks
Bore dia
Roughness Ra
Oversizes
mm

mm
73 + 0.01
1.0 – 1.2
+ 1
0.15