UD TRUCKS NISSAN DIESEL BIG THUMB RESONA CW53 CW520 CD53 CK53 RE8 RD8 RF8 RG8 14.3L 15.1L 17.0L 17.9L V8 DIESEL ENGINE COOLING WATER PUMP ASSY (OE: 21010-97110 / 21010-97110A / 2101097110 / 21010-97367 / 2101097367 / GWN-66A)

Overview

The UD Trucks / Nissan Diesel Big Thumb CW53 RE8 / RD8 V8 Engine Water Pump Assembly (Water Pump Assy 21010-97110 / 21010-97110A / 21010-97367 / GWN-66A) is a commercial-grade engine cooling system component engineered specifically for UD Trucks and Nissan Diesel heavy commercial transport trucks, prime movers, and multi-axle tippers powered by Nissan Diesel RE8 (15.1L), RD8 (14.3L), RF8 (17.0L), and RG8 (17.9L) naturally aspirated and turbocharged V8 direct-injection diesel engines (UD Big Thumb, Resona, CW53, CW520, CW540, CD53, CK53, and C-Series heavy prime movers, logging trucks, cargo lorries, dump trucks, and concrete mixers). Built with a precision-machined drive assembly, heavy-duty cast iron volute housing, precision multi-bolt mounting base, and high-efficiency cast internal impeller, this water pump delivers continuous, pressurized coolant circulation through both cylinder banks, cylinder heads, and engine oil coolers of the massive V8 engine. Replacing a worn, noisy, bearing-seized, or leaking water pump restores optimal operating temperatures, preventing severe engine overheating, cylinder liner cavitation, and blown head gaskets under sustained heavy commercial payloads.

Key Dimensions & Specifications

• Drive & Pulley Hub Configuration: Precision-machined drive assembly with heavy-duty mounting flange/pulley interface engineered for concentric rotation and high torsional stability under heavy V8 engine operation.

• Heavy-Duty Cast Iron Housing: Thick-walled cast iron volute casing with internal flow runners and external structural reinforcement ribs designed to withstand extreme engine vibration and high thermal loads.

• Mounting Base Configuration: Multi-bolt perimeter mounting flange base with a flat CNC-machined rear sealing surface for direct installation onto the engine timing case / front water cavity.

• High-Capacity Bearing & Mechanical Shaft Seal: Industrial-grade sealed roller/ball bearing cartridge paired with a wear-resistant silicon-carbide/carbon mechanical shaft seal to prevent shaft play and coolant weepage under continuous load.

• High-Flow Internal Impeller: Dynamically balanced cast impeller designed for continuous, high-volume coolant displacement across both cylinder banks of the large-displacement V8 block.

• Please verify your existing water pump mounting bolt pattern, pulley hub profile, and coolant port orientation against your old sample pump before ordering.

Compatible Truck Models & Engine Applications

• UD TRUCKS / NISSAN DIESEL COMMERCIAL TRUCKS & PRIME MOVERS:

  • Big Thumb Heavy Truck Series (CW53, CW520, CW540, CD53, CK53, CV53, CG53 Heavy Prime Movers, Heavy Cargo Lorries, Multi-Axle Tippers, Dump Trucks & Concrete Mixers)

  • Resona Heavy Commercial Series (Late-model RD8 / RE8 V8 transitions)

• Engine Application:

  • Nissan Diesel / UD RE8 (15.1L / 15,115cc V8 Naturally Aspirated Direct Injection Diesel)

  • Nissan Diesel / UD RD8 (14.3L / 14,313cc V8 Naturally Aspirated Direct Injection Diesel)

  • Nissan Diesel / UD RF8 (17.0L / 16,991cc V8 Naturally Aspirated Diesel)

  • Nissan Diesel / UD RG8 (17.9L / 17,990cc V8 Naturally Aspirated Diesel)

• OEM & Cross-Reference Part Numbers:

  • 21010-97110 / 2101097110 (Nissan Diesel / UD Genuine OEM)

  • 21010-97110A / 21010-97110-A

  • 21010-97367 / 2101097367

  • 21010-97368 / 2101097368

  • 21010-97072 / 2101097072

  • GMB: GWN-66A / GWN66A

• (Note: Nissan Diesel heavy trucks use completely different water pumps across inline-6 [PE6 / PF6 / GE13] and V8 [RD8 / RE8 / RF8 / RG8] engine platforms. This 21010-97110 / 21010-97110A unit is engineered specifically for UD CW53 and related heavy models powered by RE8 / RD8 / RG8 V8 engines. Always verify your chassis series [CW53] and engine model [RE8 / RD8] prior to ordering.)
   

  Why Choose Our Commercial Truck Parts?

• High-Volume Dual-Bank Coolant Flow: Precision-balanced internal impeller delivers steady, pressurized coolant circulation through both cylinder banks and oil coolers, eliminating localized hot spots under heavy hauling.

• High-Capacity Bearing & Mechanical Seal: Industrial-grade sealed bearing assembly and wear-resistant mechanical shaft seal withstand high belt/drive radial forces and cooling system pressures without shaft wobble or weepage.

• Rigid Cast Iron Volute Body: Thick-walled iron casting resists thermal fatigue, engine vibration, and cracking during heavy commercial operation.

• Precision CNC-Machined Mounting Flange: Flat-machined sealing surface ensures direct bolt-on installation with dependable, leak-free gasket sealing against the engine block.

• Ready Stock & Fast Shipping: Readily stocked for quick dispatch
   

  Need Help Confirming Fitment?

  Unsure whether this 21010-97110A water pump matches your UD CW53 truck's existing V8 engine setup?

• Check your old pump against the mounting base pattern, drive profile, and port layout.

• Or send your Chassis Number (VIN) / Engine Model (RE8 / RD8 / RG8) / sample photos to our team via WhatsApp for instant confirmation!