UD TRUCKS NISSAN DIESEL RESONA BIG THUMB C-SERIES CW CD CK CV PE6 PE6T PE6-T 11.7L DIESEL 20T DRIVE GEAR ENGINE COOLING WATER PUMP ASSY (OE: 21010-96172 / 2101096172 / 21010-96171 / 21010-96170 / 21010-96168 / 21010-96169 / 21010-96167)

Overview

The UD Trucks / Nissan Diesel Resona / Big Thumb PE6T 20T Gear-Driven Engine Water Pump Assembly (Water Pump Assy 21010-96172 / 2101096172 / 21010-96171 / 21010-96170) 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 PE6 (11.7L naturally aspirated) and PE6T / PE6-TA (11.7L turbocharged) 6-cylinder direct-injection diesel engines (UD Resona, Big Thumb, CW, CD, CK, CV, and CG series heavy prime movers, logging trucks, cargo lorries, dump trucks, and concrete mixers). Built with a precision-machined 20-tooth (20T) drive gear, heavy-duty cast iron volute housing, precision-machined multi-bolt perimeter mounting base, and dynamically balanced high-flow internal impeller, this gear-driven water pump delivers continuous, pressurized coolant circulation through the massive 11.7L engine block, cylinder head, and oil cooler. Replacing a worn, noisy, bearing-seized, or leaking water pump restores optimal cooling efficiency and prevents catastrophic engine overheating under sustained commercial transport and heavy-load hauling.

Key Dimensions & Specifications

• Drive Mechanism: Precision-machined 20-tooth (20T) drive gear engineered for direct, smooth engagement with the engine timing gear train.

• Heavy-Duty Cast Iron Housing: Thick-walled volute casing built to withstand extreme vibration, heavy radial gear loads, and high engine operating temperatures.

• 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 block cavity.

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

• Coolant Flow Impeller: High-efficiency cast internal impeller designed for continuous, high-volume coolant displacement across the 11.7L inline-6 cylinder block and oil cooler.

• Please count your drive gear teeth (20T) and verify your existing water pump mounting pattern against your old sample pump before ordering.

Compatible Truck Models & Engine Applications

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

  • Resona & Big Thumb Heavy Series (CW, CD, CK, CV, CG Heavy Prime Movers, Heavy Cargo Lorries, Multi-Axle Tippers, Dump Trucks & Concrete Mixers)

  • C-Series Heavy Commercial Vehicles running PE6 / PE6T engines

• Engine Application:

  • Nissan Diesel / UD PE6 (11.7L / 11,670cc Inline-6 Naturally Aspirated Direct Injection Diesel)

  • Nissan Diesel / UD PE6T / PE6-T / PE6-TA / PE6-TB (11.7L / 11,670cc Inline-6 Turbocharged & Intercooled Diesel)

• OEM & Cross-Reference Part Numbers:

  • 21010-96172 / 2101096172 (Nissan Diesel / UD Genuine OEM)

  • 21010-96171 / 2101096171

  • 21010-96170 / 2101096170

  • 21010-96168 / 2101096168

  • 21010-96169 / 2101096169

  • 21010-96167 / 2101096167

  • 21010-96166 / 2101096166

• (Note: Nissan Diesel PE6 and PE6T engines utilize different water pump drive gear tooth counts depending on the engine model year and application. This 21010-96172 unit is specifically configured with the 20T drive gear. Always count the gear teeth [20T] and match your old sample pump prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Induction-Hardened 20T Drive Gear: Heat-treated gear teeth resist pitting, surface fatigue, and gear backlash, ensuring smooth, quiet timing gear mesh under high torque.

• High-Volume 11.7L Coolant Flow: Precision-cast impeller delivers steady, pressurized circulation across both the cylinder block and oil cooler, eliminating hot spots under heavy turbo boost and pulling loads.

• High-Capacity Bearing & Mechanical Seal: Sealed heavy-duty bearing cartridge paired with a premium silicon-carbide mechanical seal withstands continuous gear-driven radial forces without developing shaft wobble or weeping.

• Precision CNC-Machined Mounting Flange: Flat-machined sealing surface ensures a secure, leak-free gasket installation directly onto the engine block.

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

Need Help Confirming Fitment?

Unsure whether this 20T water pump matches your UD truck's existing PE6 or PE6T engine setup?

• Check your old pump against the 20T drive gear, mounting base pattern, and housing profile.

• Or send your Chassis Number (VIN) / Engine Model (PE6 / PE6T) / Gear Teeth Count (20T) / sample photos to our team via WhatsApp for instant confirmation!