DETROIT DIESEL 53
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
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
SEC. 1.1.2 Page 1