DETROIT DIESEL 53
Connecting Rod 1.6.3
CYLINDER LINER
The cylinder liners (Fig. I) are of the replaceable wet
type, made of hardened alloy cast iron, and are a slip fit
in the cylinder block.
They are inserted in the cylinder bores from the top of
the cylinder block. The flange of each liner rests on a
counterbore in the top of the block.
A synthetic rubber seal ring, recessed in the cylinder
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
The angle of the ports in the cylinder liner creates a
contaminated air into the cylinder, the air cleaners must
uniform swirling motion to the intake air as it enters the
be serviced regularly according to the surroundings in
cylinder.
This motion persists throughout the
which the engine is operating.
compression stroke and facilitates scavenging and
If the worn clearance between the piston and cylinder
liner becomes excessive or should the liner be badly
The wear on a liner and piston is directly related to the
scored resulting in unsatisfactory engine performance,
amount of abrasive dust and dirt introduced into the
the cylinder liner must be replaced.
engine combustion chamber through the air intake. This
dust, combined with lubricating oil on the cylinder wall,
Remove Cylinder Liner
forms a lapping compound and will result in rapid wear.
Therefore, to avoid pulling
If necessary, a cylinder liner or liners may be removed
from the cylinder block as follows:
1. Remove the piston and connecting rod assembly as
outlined in Section 1.6 under Remove Piston and
Connecting Rod.
2. If the engine has been in service for an extended
period, considerable effort may be required to
loosen the liner frown its position. When this
condition exists, remove the liner with tool set J
22490 (Fig. 2) as follows:
a. Slip the lower puller clamp up the puller rod
and off its tapered seat. Cock the clamp so
it will slide down through the liner. The
clamp will drop back onto its seat in a
horizontal position after it clears the bottom
of the liner.
b.
Slide the upper puller clamp down against
Fig. 1. - Cylinder Liner
the top edge of the liner.
c.
With the tool in place, strike the upset head
on the upper end of the puller rod a sharp
blow with the puller weight, thus releasing
the liner. Remove the liner.
1970 General Motors Corp.
July, 1970
SEC. 1.6.3 Page 1
