Engineered specifically for 2011 through 2024 Ford F-250, F-350, F-450, and F-550 Super Duty trucks powered by the 6.7L Powerstroke V8 turbo diesel engine, the Alliant Power Secondary Engine Auxiliary Water Pump (Part # AP63505) provides a dependable replacement for the truck's independent low-temperature cooling system. In Ford's dual-loop cooling strategy, the primary high-temp water pump cools the engine block and heads, while this lower-mounted secondary pump drives coolant through the liquid-to-air charge air cooler (CAC), diesel fuel cooler, transmission fluid heat exchanger, and secondary EGR cooling core.

Operating under constant accessory drive load, factory secondary pumps are prone to weep-hole dripping, ceramic face seal degradation, and bearing play over high operating hours. When the secondary pump underperforms, intake air temperatures (IATs) rise rapidly, charge-air density drops, and fuel temperatures climb. The Alliant Power AP63505 matches Tier-1 OEM dimensional specifications, fitting into both single-alternator and dual-alternator secondary pump housings, and ships complete with a replacement perimeter profile gasket and zero core charge.

Key Features & Benefits

• OEM-Tier Direct Replacement: Built to meet or exceed Ford factory specifications for dependable low-temperature cooling loop circulation without dealership markups.
• Dual-Loop Auxiliary Protection: Maintains proper coolant flow through the liquid charge air cooler (CAC), fuel rail heat exchanger, and transmission cooler.
• Universal Alternator Fitment: Designed to fit seamlessly into factory secondary pump housings on both single-alternator and dual-alternator engine packages.
• Unitized Mechanical Face Seal: Prevents coolant leakage and weep-hole weeping under continuous high-load towing and hot engine-bay temperatures.
• Heavy-Duty Internal Bearing Pack: Resists belt sideload runout and premature shaft wobble under serpentine drive tension.
• Includes Precision Channel Gasket: Comes pre-packaged with the required perimeter profile seal for a clean, leak-free installation against the front timing housing.
• 24-Month Manufacturer Warranty: Backed by Alliant Power's 24-month, unlimited-mileage limited warranty.
• Zero Core Charge: Sold outright as brand-new hardware requiring no core deposit or core return shipping.

Technical Specifications

• Manufacturer / Brand: Alliant Power
• Manufacturer Part Number / SKU: AP63505
• Alternative Part Numbers: AP-63505 / ALLAP63505
• OEM Cross-Reference Numbers: BC3Z-8501-B, BC3Z-8501-C, BC3Z8501B, BC3Z8501C, PW-503, PW-504, PW-500
• Cooling Circuit Application: Secondary (Auxiliary / Low-Temperature) Cooling Loop
• Drive Mechanism: Mechanical Serpentine Belt-Driven Pump
• Alternator Compatibility: Fits Single and Dual Alternator Engine Configurations
• Housing Material: Precision Die-Cast Aluminum
• Hardware Included: Direct-Fit Perimeter Channel Profile Gasket
• Truck Platform: 2011–2024 Ford Super Duty (F-250, F-350, F-450, F-550)
• Engine Platform: 6.7L Powerstroke V8 Turbo Diesel
• Core Requirement: None
• Warranty: Alliant Power 24-Month / Unlimited-Mileage Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2011–2024 Ford F-250 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single & Dual Alternators)
• 2011–2024 Ford F-350 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single & Dual Alternators)
• 2011–2024 Ford F-450 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single & Dual Alternators)
• 2011–2024 Ford F-550 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single & Dual Alternators)
• Fits Model Years: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
• Cooling Circuit Verification: Fits the Secondary (Low-Temperature / Auxiliary) Circuit only, positioned lower on the front timing cover. (For the primary high-temp engine water pump on 2011–2016 models, pair with Alliant Power SKU AP63507).
• Installation Tip: Clean the timing cover receiver groove thoroughly before seating the new profile gasket dry into the channel. Tighten the retaining bolts in an alternating cross pattern to factory Ford specification (89 in-lbs / 10 Nm) to avoid uneven flange loading. Vacuum-bleed the secondary cooling system with Motorcraft Yellow Antifreeze/Coolant (WSS-M97B57-A2) to ensure no air remains trapped inside the charge air cooler core.