The Alliant Power AP63303 is a new 88MM pulley water pump for 6.7L Cummins applications. Alliant’s Engine Water Pump circulates coolant through the engine and cooling system.

Features & Benefits

• New Alliant Power 88MM Pulley Water Pump (Alliant P/N AP63303)
• 88mm Hardened Steel Pulley
• 82.75mm Premium Plastic Impeller
• Optimized design through use of CDF Simulation
• Assembled in a QS9000 certified facility
• Cummins Isb 3.9L 4.4L 5.9L 6.7L Jcb Equipment 02/911873R 5473172 3800984 New Engine Water Pump
• Direct replacement for 3800984 / 3800984NX / 3800984RX
• Backed by Alliant Power’s 24-month, unlimited-mileage warranty

Included in the Box

• 1x Premium OE Water Pump
• 1x Water Pump mounting Seal

Application

• Listed by Full Force Diesel for 6.7L Cummins applications; Alliant Power does not publish a vehicle application list for this part number

Always verify fitment against your VIN, engine, and OE part number before ordering.

Cross-Reference / Replaces

• Cummins: 3800984, 3800984NX, 3800984RX, 4891252, 4891280, 5312296, 5473172, 5524785, 2881804, 3003749
• ACDelco: 252-920
• Hella: 8MP376808524
• Alliant Power: AP63303

Warranty: Alliant Power’s standard warranty: 24 months with unlimited miles/hours on installed parts (Alliant Power warranty policy, rev. Aug 2025).