Engine Systems DETROIT DIESEL AIR SlLENCER The air silencer (Fig. 1 l), used on some marine models, is bolted to the air intake side of the blower housing. The silencer has a perforated steel partition welded in place parallel with the outside faces, enclosing flame proof, felted cotton waste which serves as a silencer for air entering the blower. While no servicing is required on the air silencer proper, it may be removed when necessary to replace the air intake screen. This screen is used to filter out any large foreign particles which might seriously damage the blower assembly. Fig.
11 - Silencer Assembly AIR BOX DRAINS In normal operation, a slight amount of vapor from the air condenses and settles at the bottom of the air box. This condensation is drained through air box drain tubes (Fig. 12) which direct the expelled air and vapor down and away from the engine. Air box drains must be open at all times, otherwise water and oil may accumulate in the air box and be drawn into the cylinders with the incoming fresh air. Therefore, periodic checks should be made to ensure they are open. Remove the air box covers and examine the air box floor for oil or an accumulation of water.
If oil or water is found, wipe the air box dry with clean rags and remove and clean the air box drain tubes. Fig. 12 - Air Box Drains Page 20 ,