Category Archives: 6.7L Cummins

Remove the capscrews, water inlet connection, gasket, and rectangular sealing ring(s).  

NOTE: Due to the number of water inlet connection options, the following procedure has been commonized. The illustrations may not match the engine being serviced, but the procedures are the same.  

Install the new sealing ring into the pump groove. Install the water pump (with seal) and mounting capscrews. Torque Value: 30 N•m [ 22 ft-lb]  

Clean the water pump with solvent. Dry with compressed air. Clean the sealing surface on the cylinder block. Clean the o-ring sealing surface on the water pump housing. Inspect the sealing surface for damage. Replace the water pump if any damage is found. NOTE: If any damage to the impeller blades is found, make sure… Read More »

Remove the two mounting capscrews, water pump, and seal.  

Inspect the water pump housing for cracks and or other damage. Check the water pump seal weep hole. The water pump seal design requires a coolant film for lubrication and cooling. Therefore, it is normal to observe a minor chemical buildup or streaking at the weep hole. NOTE: A streak or chemical buildup at the… Read More »

NOTE: It is not practical to replace the components of the water pump; the water pump is serviced as an assembly. The water pump is a belt-driven, centrifugal-type pump with the inlet and bypass as integral parts of the cylinder block.  

NOTE: Use the tension of the drive belt to hold the cooling fan in place when tightening the mounting capscrews. Do not hold the fan blades to keep the cooling fan from rotating. If the engine is not equipped with an engine driven cooling fan, install the fan pulley mounting capscrews and fan pulley. Do… Read More »

Clean the fan pulley and spacer with solvent and dry with compressed air. Inspect the fan pulley for cracks near the bolt holes and for damage at the drive belt contact surface. If damage is found on the fan pulley, the fan hub must also be inspected. Refer to Procedure 008-036 in Section 8. Replace… Read More »

NOTE: Some applications do not have a cooling fan or the cooling fan is located elsewhere on the application. If equipped, remove the cooling fan. Refer to the OEM service manual for instructions. For engines equipped with an engine driven cooling fan, the fan holds the fan pulley and spacer in place. Remove the fan… Read More »