Cylinder Block Assembly; Cylinder Block Bores - To Inspect - Perkins 700 Series User Handbook Manual

Section 16

Cylinder Block Assembly

Operation:

Cylinder block bores - to inspect

Recommended torque:
Engine type Nm
-
Service operations:
1. Remove cylinder head ... ... section 12
05/99
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Special notes and tools:
lbf ft kgf m Check for areas where the honed finish has been polished away. Check
especially the area around the top of the bore just below the carbon ring. In
this area, there is maximum wear from the top piston ring.
Caution: An engine can have high oil consumption with very little wear of the
bores, if the surfaces of the bores are glazed.
Check the cylinder bores for wear and other damage. The bores should be
checked at the top, the centre, the bottom and in two directions, across the
engine and along the centre line.
If the cylinder bores are worn by more than 0,25 mm (0.01 in), the bores can
be bored and honed 0,5 mm (0.020 in) oversize in diameter and oversize
pistons fitted. To ensure that the engine will conform to emissions legislation
after it has been bored, the cylinder bores must be diamond honed,
silicon carbide base honed and then silicon carbide plateau honed to the
surface finish shown in Data and dimensions.
Caution: If the cylinder block is to be bored, all cylinders must be bored and
new pistons fitted as a complete set.
700 Series
16.01
91