1.1 Cylinder Block
DETROIT DIESEL 53
Each cylinder liner is retained in the block by a flange at its upper end, which seats in the counterbore in the block bore.
An individual compression gasket is used at each cylinder.
When the cylinder head is installed, the gaskets and seal rings compress sufficiently to form a tight metal-to-metal
contact between the head and the block.
The In-Line cylinder blocks were revised at the idler gear hub mounting pads, to increase the rigidity of the flywheel
housing, by increasing two of the three 5/16"- 18 bolt holes of each mounting pad to 3/8 " - 16 bolt holes (Fig. 7). The 3/8
" - 16 bolt holes were incorporated in engines beginning with serial numbers 2D-903, 3D-011 and 4D-103. Revised end
plates, end plate-to-block gaskets and flywheel housing are required with the change in bolt sizes. Only the revised
cylinder blocks are available for service.
The In-Line cylinder blocks have also been revised to improve the breathing characteristics and increase the flow of the
lubricating oil returning from the cylinder head to the engine oil sump by the addition of two vertical oil passages directly
under the camshaft and balance shaft at the front end of the cylinder block (Fig. 8). Cylinder blocks with the vertical oil
Fig. 3 - Air and Water Passages in In-Line Cylinder Block