TOYOTA DYNA BU66 BU88 BU101 BU142 DAIHATSU DELTA DV166 V116 13B 14B 15B 3.4L 3.7L 4.1L OD 80MM 25MM 4-HOLE HUB ENGINE COOLING WATER PUMP ASSY (OE: 16100-59245 / 1610059245 / 16100-59165 / 16100-59246 / GWT-110A / WPT-026)

Overview

The Toyota Dyna / Daihatsu Delta 13B 14B Engine Water Pump Assembly (Water Pump Assy 16100-59245 / 1610059245 / GWT-110A) is a commercial-grade engine cooling system component engineered specifically for Toyota Dyna, Toyoace, and Daihatsu Delta commercial trucks powered by Toyota / Daihatsu 13B (3.4L), 14B (3.7L), 11B (3.0L), and 15B-F (4.1L) direct-injection diesel engines (Toyota Dyna BU66, BU88, BU100, BU101, BU110, BU142, and Daihatsu Delta DV166, V116, V118, V119 commercial cargo lorries, wooden body trucks, tippers, and box vans). Built with a pre-installed 4-hole threaded pulley/fan mounting flange hub (80mm outer diameter with a 25mm stepped pilot register), large front radiator hose elbow pipe, dual lower auxiliary bypass/heater ports (one unthreaded pipe + one threaded port), and an elongated multi-bolt mounting arm configuration, this heavy-duty cast iron water pump delivers continuous, pressurized coolant circulation through the engine block and cylinder head. Replacing a worn, noisy, bearing-seized, or leaking water pump prevents engine overheating, head gasket failure, and thermal breakdown under heavy commercial payloads.

Key Dimensions (As Labeled in Product Photos)

• Top Pulley / Fan Hub Configuration: Pre-installed CNC-machined steel mounting flange featuring 4 threaded bolt holes, 80mm flange outer diameter, 25mm stepped pilot register collar, and a protruding center pilot shaft.

• Elongated Cast Iron Body: Heavy-duty cast iron housing with an extended right-hand mounting bracket arm featuring multiple precision through-bolt mounting holes for rigid engine block attachment.

• Coolant & Bypass Port Design:

  • Main Hose Elbow: Large-diameter curved hose inlet pipe on the left side for direct radiator lower hose connection.

  • Auxiliary Lower Ports: Features 1 downward-facing round bypass/heater pipe port and 1 female threaded auxiliary sensor/fitting boss on the lower front casting.

• Measurement Notice: Key specifications including the 80mm top flange outer diameter, 25mm pilot step diameter, 4-hole threaded hub, main hose elbow, and lower auxiliary ports are shown directly in our product photos.

• Please verify your existing water pump top flange diameter (80mm), pilot step (25mm), and lower auxiliary port layout against our product photos before ordering.

Compatible Truck Models & Engine Applications

• TOYOTA COMMERCIAL TRUCKS & BUSES:

  • Dyna & Toyoace Series (BU60, BU61, BU65, BU66, BU85, BU88, BU91, BU100, BU101, BU110, BU142, BU212, BU222 Commercial Cargo Lorries, Wooden Body Trucks, Tippers & Box Vans)

  • Coaster Bus Series (BB40, BB42 running 14B / 3B engines)

• DAIHATSU DELTA COMMERCIAL TRUCKS:

  • Delta Series (DV166, V116, V118, V119, V98, V99 Commercial Cargo Trucks & Tippers)

• Engine Application:

  • Toyota / Daihatsu 14B (3.7L / 3,661cc Inline-4 Direct Injection Diesel)

  • Toyota / Daihatsu 13B / 13B-T (3.4L / 3,431cc Inline-4 Diesel / Turbo Diesel)

  • Toyota 11B (3.0L Inline-4 Diesel)

  • Toyota 15B-F / 15B-FT (4.1L / 4,104cc Inline-4 Diesel)

• OEM & Cross-Reference Part Numbers:

  • 16100-59245 / 1610059245 (Toyota / Daihatsu Genuine OEM)

  • 16100-59165 / 1610059165

  • 16100-59246 / 1610059246

  • 16100-59247 / 1610059247

  • GMB: GWT-110A / GWT-82A

  • AISIN: WPT-026 / WPT-054

  • NPW: T-93

• (Note: Toyota Dyna and Daihatsu Delta 13B / 14B engines use several water pump variants that differ in top hub diameter [e.g., 70mm vs. 80mm] and pilot collar size [e.g., 16mm vs. 25mm]. This 16100-59245 unit specifically features an 80mm outer diameter flange hub with a 25mm stepped pilot collar and dual lower auxiliary ports. Always measure your old sample pump's top hub OD [80mm] and pilot step [25mm] prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Pre-Installed 80mm / 25mm 4-Hole Flange Hub: Factory-pressed, CNC-machined steel hub with 4 tapped mounting holes ensures concentric pulley/fan alignment and eliminates belt runout or wobble.

• Heavy-Duty Cast Iron Housing: Thick-walled iron casting with reinforced mounting arms resists engine vibration, thermal stress, and cracking during heavy-load commercial haulage.

• Precision-Machined Flanges & Ports: Smooth hose neck, clean-cut threaded sensor port, and flat mounting surfaces provide direct bolt-on installation with dependable leak-free sealing.

• High-Grade Bearing & Mechanical Shaft Seal: Engineered to withstand continuous fan belt tension and elevated cooling system pressures without developing shaft play or premature coolant weepage.

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

Need Help Confirming Fitment?

Unsure whether this 16100-59245 water pump matches your lorry's existing engine setup?

• Check your old pump against the 80mm / 25mm 4-hole top hub, main hose elbow, and lower auxiliary ports shown in our pictures.

• Or send your Chassis Number (VIN) / Engine Model (13B / 14B) / sample photos to our team via WhatsApp for instant confirmation!