Here is what you are going to need to do to replace the water pump on a 6.6. Note the special holding tool that goes in place of the starter. This is a must to remove the balancer due to the balancer bolt being tightened to 260 ft lbs. Feel free to contact me with any questions! Good luck!
Tighten Tighten the water pump bolts to 21 N·m (15 lb ft).
Tighten Tighten the water pump to water pump outlet pipe nuts to 21 N·m (15 lb ft).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the bolt with plain washer to 363 N·m (278 lb ft).
Tighten Tighten the starter motor bolts to 78 N·m (58 lb ft).