DETROIT DIESEL 53
1.1.2
AIR BOX DRAINS
During normal engine operation, water vapor from the air charge, as well as a slight amount of fuel and lubricating oil
fumes, condenses and settles on the bottom of the air box. This condensation is removed by the air box pressure through
air box drain tubes mounted on the sides of the cylinder block.
The air box drains must be kept open at all times, otherwise water and oil that may accumulate will be drawn into the
cylinders.
One drain tube is used on an In-line engine (Fig. 1).
Fig .1 Air Box Drain Tube Mounting (In-Line Engines)
November, 1973
SEC. 1.1.2
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