5.1 Water Pump
DETROIT DIESEL 53
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 Ib-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.
Fig. 7. - Comparison of Water Pumps
NOTE: The face of the ceramic insert
must be square with the axis of the
common solvent such as alcohol. Wipe clean with a dry
tapered bore within .004". The pump
shaft may be used as a mandrel for
3. Place the adhesive washer in the impeller bond area
with the ceramic insert on top. The polished face of
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
Fig. 8. - Details of Water Pump with Ceramic Seal
1970 General Motors Corp.