This is an original, upgraded and modified water pump assembly designed to replace the original water pump used by the ninth generation Milwaukee-8 107 cubic inch (1746 cc) and 114 cubic inch (1868 cc) engines, as well as some CVO models, produced between 2017 and 2023. The most iconic feature is the use of AW (Anti-Wear, Abrasion Resistant) rubber seal rings and impellers designed to eliminate the water leakage problems prevalent in early M8 engine pumps.g.
Background and Problems Solved
·It can better resist the influence of long-term immersion of coolant and high temperature of engine, greatly extend the service life of sealing ring and impeller, and fundamentally reduce the leakage caused by material aging and wear.
·Improved impeller shape provides more stable and reliable flow, helping the engine maintain optimum operating temperature.
·For car owners, this means a "once for all" solution. When this pump is replaced, there is usually no longer a concern about pump leakage.
Background and Problems Solved
In the early stages of the launch of the Milwaukee-8 engine (around 2017-2019), the pump had a high failure rate due to design and material issues. The main problems are:
Leakage of coolant: the most common fault. A small amount of leakage will cause pink (original coolant color) stain on the left side of the engine (water pump position). In serious cases, the coolant will drop to the ground, causing the coolant level to drop and the engine to overheat.
Bearing abnormal noise or wear: pump bearing wear will produce abnormal noise.
Early wear: the original water pump internal seal ring and impeller material are not wear-resistant, easy to cause premature wear due to fine particles or chemical properties in the coolant.
The official Halley Davis noted this issue and launched this AW rubber water pump as a solution and improvement component. Later production models (after approx. 2020) have gradually been directly fitted with this modified pump.
Product Features
Leakage of coolant: the most common fault. A small amount of leakage will cause pink (original coolant color) stain on the left side of the engine (water pump position). In serious cases, the coolant will drop to the ground, causing the coolant level to drop and the engine to overheat.
Bearing abnormal noise or wear: pump bearing wear will produce abnormal noise.
Early wear: the original water pump internal seal ring and impeller material are not wear-resistant, easy to cause premature wear due to fine particles or chemical properties in the coolant.
The official Halley Davis noted this issue and launched this AW rubber water pump as a solution and improvement component. Later production models (after approx. 2020) have gradually been directly fitted with this modified pump.
Revolutionary AW Rubber Material
·This is the most central feature. AW rubber has excellent abrasion resistance, heat resistance and chemical resistance compared to plain rubber or composite materials used in earlier models. ·It can better resist the influence of long-term immersion of coolant and high temperature of engine, greatly extend the service life of sealing ring and impeller, and fundamentally reduce the leakage caused by material aging and wear.
Enhanced Impeller Design
·The impeller is integrated with AW sealing ring or matched precisely to ensure efficient coolant circulation. ·Improved impeller shape provides more stable and reliable flow, helping the engine maintain optimum operating temperature.
Long-Term Sealing and Reliability
·The AW seal ring is matched with ceramic or high hardness metal shaft sleeve to form an extremely durable dynamic seal system. This combination greatly reduces the possibility of leakage and promises a much longer service life than earlier pumps. ·For car owners, this means a "once for all" solution. When this pump is replaced, there is usually no longer a concern about pump leakage.
Complete OEM Upgrade Kit
·The pump is usually supplied as an assembly (Haley part number 63800-08 is one of its common modified pump assembly numbers) and contains all internal components such as pump body, impeller, seal, bearing, etc.