DETROIT DIESEL 53
4.8
VENTILATING SYSTEM
On 6V engines, a breather assembly is mounted on the
Harmful vapors which may be formed within the engine
upper engine front cover (Fig.1).
are removed from the crankcase, gear train and valve
compartment by a continuous, pressurized ventilating
Service It is recommended that the breather tube be
system.
inspected and cleaned, if necessary, to eliminate the
possibility of clogging.
This can best be done by
A slight pressure is maintained in the engine
removing the tube from the engine, washing it with a
crankcase by the seepage of a small amount of air from
suitable solvent and drying it with compressed air.
the airbox past the piston rings. This air sweeps up
through the engine and is drawn off through) a
The
wire
mesh
pad
(element)
in
the
breather
crankcase breather.
1970 General Motors Corp.
December, 1970
SEC. 4.8 Page 1
