Engineered specifically for 2020 through 2026 Ford F-250, F-350, F-450, and F-550 Super Duty trucks equipped with the revised third-generation 6.7L Powerstroke V8 turbo diesel engine (including High Output 1,200 lb-ft variants), the Genuine Ford Primary Engine Water Pump Assembly (Part # LC3Z-8501-B / Motorcraft PW-634) powers the main high-temperature thermal management system. Beginning with the 2020 model year engine refresh, Ford revised the front timing cover geometry, water pump volute, and accessory drive layout to manage the higher thermal loads of steel pistons, elevated peak cylinder pressures, and higher cooling circulation demands.

The primary high-temperature cooling loop is responsible for cooling the engine block, cylinder heads, engine oil cooler, and EGR cooler. Under severe commercial service, frequent heavy towing, and extreme ambient heat, worn water pumps suffer from mechanical ceramic face seal erosion, bearing runout, and weep-hole leakage. Part number LC3Z-8501-B supersedes the earlier LC3Z-8501-A revision with enhanced seal materials and internal bearing races designed to handle the increased serpentine belt preload of modern Super Duty accessory drives. Shipped complete with a factory-balanced press-fit pulley and molded rubber perimeter gasket, it delivers an exact bolt-on replacement with zero core charge.

Key Features & Benefits

• Genuine Ford OEM / Motorcraft Part: Designed, tested, and validated to Ford factory engineering standards for third-generation 6.7L Powerstroke engines.
• Third-Gen 6.7L Thermal Management: Optimized internal volute and impeller design tailored to the higher heat rejection demands of 2020–2026 standard and High Output (H.O.) 6.7L engines.
• Pre-Pressed Serpentine Pulley Included: Eliminates the need for specialized hub pullers and press tools by arriving with a factory-aligned, pre-installed drive pulley.
• Updated Internal Bearing & Seal Pack: Incorporates revised unitized ceramic shaft seals and heavy-duty bearing assemblies to eliminate coolant seepage from the weep cavity.
• Includes Molded Perimeter Gasket: Comes pre-packaged with the factory-profile rubber gasket to guarantee a leak-free seal against the front engine timing case.
• Direct Supersession: Replaces and upgrades earlier production revision LC3Z-8501-A.
• Zero Core Charge: Outright purchase requiring no core deposit, no core return shipping, and no core inspection delay.

Technical Specifications

• Manufacturer / Brand: Ford Motor Company / Motorcraft
• Manufacturer Part Number / SKU: LC3Z-8501-B
• Motorcraft Short Part Number: PW-634 / PW634
• Superseded / Alternative Part Numbers: LC3Z-8501-A, LC3Z8501A, LC3Z8501B, LC34-8501-AA, LC34-8501-AB
• Cooling Loop Application: Primary High-Temperature Engine Cooling Circuit
• Drive Mechanism: Serpentine Belt-Driven Mechanical Pump
• Housing Construction: High-Strength Die-Cast Aluminum
• Impeller Design: Precision-Balanced High-Flow Stamped / Machined Steel Impeller
• Hardware Included: Pre-Pressed Multi-Rib Serpentine Pulley & Molded Perimeter Gasket
• Truck Platform: 2020–2026 Ford Super Duty (F-250, F-350, F-450, F-550)
• Engine Platform: 3rd Gen 6.7L Powerstroke V8 Turbo Diesel (Standard & High Output)
• Core Requirement: None
• Warranty: Ford Motorcraft 2-Year / Unlimited-Mile Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2020–2026 Ford F-250 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Standard & H.O.)
• 2020–2026 Ford F-350 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Standard & H.O.)
• 2020–2026 Ford F-450 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Standard & H.O.)
• 2020–2025 Ford F-550 Super Duty – 6.7L Powerstroke V8 Turbo Diesel (Standard & H.O.)
• Fits Model Years: 2020, 2021, 2022, 2023, 2024, 2025, 2026
• Platform Generation Split Notice: Engineered specifically for 2020+ third-gen engines. (For 2017–2019 model years, use SKU HC3Z-8501-A / PW-571; for 2011–2016 model years, use SKU BC3Z-8501-F / PW-497 due to front timing cover casting changes).
• Circuit Verification: Fits the Primary High-Temperature Cooling Circuit only. Note: Does not fit or replace the Secondary low-temperature coolant pump (BC3Z-8501-C).
• Installation Tip: Clean and degrease the front cover mating flange thoroughly before installing the new pump. Ensure the molded perimeter gasket is fully seated in the housing channel. Tighten the retaining bolts in an alternating cross pattern to factory Ford specification (89 in-lbs / 10 Nm) to ensure uniform gasket load. Vacuum bleed the primary cooling loop and refill with genuine Motorcraft Yellow Antifreeze/Coolant (WSS-M97B57-A2).