5.1 Water Pump
DETROIT DIESEL 53
common solvent such as alcohol. Wipe clean with a dry cloth.
3. Place the adhesive washer in the impeller bond area with the
ceramic insert on top. The polished face of the ceramic insert should
be visible to the assembler. Clamp the ceramic insert and impeller
together with a 3/8" bolt and nut and two smooth 1/8" thick washers.
Tighten the bolt to 10 lb-ft torque.
CAUTION: Do not mar the polished
surface of the ceramic insert.
4. Place the impeller assembly in a level position, with the ceramic
insert up, in an oven preheated to 350°F. and bake it for one hour.
NOTE: The face of the ceramic insert
must be square with the axis of the
Fig. 7 - Comparison of Water Pumps
tapered bore within .004". The pump
shaft may be used as a mandrel for
5. Remove the impeller from the oven and, after it has cooled to room temperature, install it in the pump. Do not
loosen the clamping bolt until the assembly cools. Make sure the mating surfaces of the water seal and the ceramic
insert are free of dirt, metal particles and oil film.
Fig. 8. Details of Water Pump with Ceramic Seal