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Msgtperrin, ASE Certified Technician
Category: Car
Satisfied Customers: 367
Experience:  ASE Certified
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How to change a water pump on 2005 6.

Customer Question

how to change a water pump on 2005 6.6 duramax
Submitted: 9 years ago.
Category: Car
Expert:  Msgtperrin replied 9 years ago.



Thanks for using JA,


Here is the procedure for removing the water pump and if it helps please click on accept and let me know if you have any other questions. There is one trick to doing this and that is make sure you hold the flywheel when trying to turn the crankshaft bolt. the socket size is a 36mm and it will take some strength.


Thanks msgtperrin

Object Number:(NNN) NNN-NNNN Size: SH
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  • Remove the left wheelhouse inner panel. Refer to Wheelhouse Panel Replacement in Body Front End.
  • Remove the thermostat housing crossover. Refer to Thermostat Housing Crossover Replacement .
  • Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement in Engine Mechanical - 6.6L (LLY).
  • Remove the water pump to engine coolant pipe nuts.
  • Remove the engine wiring harness retainer from the inner stud.
    Object Number:(NNN) NNN-NNNN Size: SH
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  • Remove the water pump bolts. Note the location of the bolts. The bolts are three different lengths.
  • Remove the water pump.
  • Remove and discard the water pump O-ring and coolant pipe gasket.
  • If required, clean and inspect the water pump. Refer to Water Pump Cleaning and Inspection in Engine Mechanical - 6.6L (LLY).