1.6.3
DETROIT DIESEL 53
CYLINDER LINER
The cylinder liner (Fig. 1) is of the replaceable wet
type, made of hardened alloy cast iron, and is a slip fit
in the cylinder block. The current liner is centrifugally
cast, while the former liner was sand cast.
The liner is inserted in the cylinder bore from the top
of the cylinder block. The flange of each liner rests on
a counterbore in the top of the block.
synthetic rubber seal ring, recessed in the cylinder
A
block bore, is used between the liner and the block to
prevent water leakage into the air box.
The upper portion of the liner is directly cooled by
water surrounding the liner. The center portion of the
liner is air cooled by the scavenging air which enters
the cylinder through eighteen equally spaced ports.
Fig. 2 Removing Cylinder Liner
intake. This dust, combined with lubricating oil on the
cylinder wall, forms a lapping compound and will
The air inlet ports in the liner are machined at an
result in rapid wear. Therefore, to avoid pulling
angle to create a uniform swirling motion to the air as
contaminated air into the cylinder. the air cleaners
it enters the cylinder. This motion persists throughout
must be serviced regularly according to the surround-
the compression stroke and facilitates scavenging and
ings in which the engine is operating
The wear on a liner and piston is directly related to
the amount of abrasive dust and dirt introduced into
the engine combustion chamber through the air
Fig. 1 Cylinder Liner
Fig. 3 - Cylinder Liner Measurement Diagram
SEC. 1.6.3 Page 1
November. 1971
