Engineered specifically for 2011 through 2019 Ford F-250, F-350, F-450, and F-550 Super Duty trucks equipped with the 6.7L Powerstroke V8 turbo diesel engine (single alternator configurations), the DieselSite Secondary Engine Auxiliary Water Pump (Part # WP67S) provides an upgraded aftermarket replacement for the dedicated low-temperature cooling loop. In the 6.7L Powerstroke thermal management system, this lower belt-driven auxiliary pump is responsible for circulating coolant through the liquid-to-air charge air cooler (CAC), fuel rail cooler, transmission fluid heat exchanger, and secondary EGR cooler.

Under heavy towing cycles and extended highway operation, mechanical auxiliary pumps frequently develop shaft bearing play or shaft seal weeping from the lower weep cavity. A failing secondary pump causes elevated intake air temperatures (IATs), high transmission fluid temperatures, and fuel heat soak. While standard OEM Motorcraft units provide only standard 12-month or 24-month warranty coverage, DieselSite constructs the WP67S with corrosion-resistant internal alloys, unitized mechanical face seals, and high-load dual-race bearings, backing every unit with a limited lifetime warranty to the original purchaser. Shipped complete with a direct-fit replacement gasket, the WP67S replaces OEM part numbers BC3Z-8501-C, PW-504, and PW-500 with zero core charge.

Key Features & Benefits

• Manufacturer Limited Lifetime Warranty: Upgrades beyond factory Motorcraft limited warranties with lifetime protection for the original purchaser.
• Low-Temperature Circuit Reliability: Ensures steady coolant volume through the liquid charge air cooler, fuel cooler, transmission heat exchanger, and secondary EGR circuit.
• Heavy-Duty Unitized Shaft Seals: Designed to withstand elevated pressure differentials and eliminate premature weep-hole seepage.
• Reinforced Bearing Assembly: Precision-machined bearing package eliminates shaft play and belt deflection under heavy accessory drive tension.
• Direct OEM Form & Fit: Designed to bolt directly to the front timing cover on single-alternator trucks without modifications or bracket fabrication.
• Includes Fresh Perimeter Gasket: Comes complete with a temperature-resistant replacement gasket to ensure a leak-free seal.
• Zero Core Charge: Outright purchase requiring no core deposit, no core return shipping, and no core inspection delays.

Technical Specifications

• Manufacturer / Brand: DieselSite Inc.
• Manufacturer Part Number / SKU: WP67S
• Alternative Part Numbers: DSI:WP:WP67S / DSTWP67S / DIWP67S
• OEM Cross-Reference Numbers: BC3Z-8501-C, BC3Z8501C, PW-504, PW504, PW-500, PW500
• Cooling Circuit Application: Secondary (Low-Temperature / Auxiliary) Cooling Loop
• Drive Mechanism: Serpentine Belt-Driven Mechanical Pump
• Alternator Compatibility: Single Alternator Equipped Trucks (Without Inverter)
• Housing Material: Die-Cast Aluminum
• Hardware Included: Direct-Fit Replacement Perimeter Gasket
• Truck Platform: 2011–2019 Ford Super Duty (F-250, F-350, F-450, F-550)
• Engine Platform: 6.7L Powerstroke V8 Turbo Diesel
• Core Requirement: None
• Warranty: DieselSite Limited Lifetime Warranty

Vehicle Fitment & Technical Installation Notes

• 2011–2019 Ford F-250 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single Alternator)
• 2011–2019 Ford F-350 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single Alternator)
• 2011–2019 Ford F-450 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single Alternator)
• 2011–2019 Ford F-550 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Single Alternator)
• Fits Model Years: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
• Circuit Verification: Fits the Secondary (Low-Temperature / Auxiliary) Cooling Circuit only. Located lower on the front timing cover. (For the primary high-temperature engine water pump, use DieselSite SKU WP67P for 2011–2016 or Ford HC3Z-8501-A for 2017–2019).
• Alternator Fitment Note: Engineered for factory single-alternator configurations without high-output dual alternators or inverter packages.
• Installation Tip: Clean the timing cover gasket groove thoroughly before inserting the new gasket. Tighten mounting bolts in an alternating cross pattern to factory Ford specification (89 in-lbs / 10 Nm). Vacuum fill the secondary cooling reservoir with Motorcraft Yellow Antifreeze/Coolant (WSS-M97B57-A2) to eliminate air pockets within the charge air cooler core.