HINO DUTRO 300 7 TON TOYOTA DYNA COASTER N04C N04CT S05C S05D 4.0L 4.1L 4.6L OD 79MM 40MM 4-HOLE HUB 8-HOLE BASE ENGINE COOLING WATER PUMP ASSY (OE: 16100-78170 / 1610078170 / 16100-E0780 / 16100-E0040 / 16100-E0042 / 16100-E0B60 / 16100-4080 / HWP-054)

Overview

The Hino Dutro 300 / Toyota Dyna N04C / S05C 8-Hole Engine Water Pump Assembly (Water Pump Assy 16100-78170 / 16100-E0780 / 16100-E0040 / 16100-E0B60 / HWP-054) is a commercial-grade engine cooling system component engineered specifically for Hino Dutro 300 Series, Dutro 7 Ton commercial trucks, Toyota Dyna / Toyoace, and Toyota Coaster commercial buses powered by Hino / Toyota N04C, N04CT, N04C-T (4.0L / 4.1L common-rail turbo diesel), S05C (4.6L), and S05D (4.9L) direct-injection diesel engines (Dutro 300, Dutro 7-Ton, XZU300, XZU400, XZU500, XZU600, XZU710, XZU720, WU410, and Coaster XZB40, XZB50 commercial cargo lorries, wooden body trucks, tippers, dump trucks, and box vans). Built in the 8-hole mounting base configuration, this water pump features a pre-installed 4-hole threaded pulley/fan mounting flange hub (79mm outer diameter with a 40mm conical pilot register collar), lightweight high-strength die-cast aluminum alloy volute housing, an 8-hole perimeter mounting base, and a 6-vane open cast iron impeller designed to deliver continuous, pressurized coolant circulation through the cylinder block, cylinder head, and radiator. Replacing a worn, noisy, bearing-seized, or leaking water pump restores optimal operating temperatures, preventing engine overheating and blown head gaskets under sustained 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, 79mm flange outer diameter, 40mm stepped/conical pilot register collar, and a precision center bearing cap.

• Mounting Base Configuration: 8-hole perimeter mounting flange base with a flat CNC-machined rear sealing surface for direct installation onto the engine timing gear casing / block.

• Impeller Design: Precision-machined 6-vane open cast iron impeller on the rear cavity engineered for high-volume coolant displacement.

• Housing Material & Construction: High-strength die-cast aluminum alloy body with smooth internal water flow runners and a lower bearing weep/drain hole.

• Measurement Notice: Key specifications including the 79mm top flange outer diameter, 40mm conical pilot collar, 4-hole threaded hub, 8-hole mounting base pattern, and 6-vane rear impeller are shown directly in our product photos.

• Please verify your existing water pump top flange diameter (79mm), pilot step (40mm), and 8-hole mounting base pattern against the measurements shown in our photos before ordering.

Compatible Truck Models & Engine Applications

• HINO COMMERCIAL TRUCKS & BUSES:

  • Dutro 300 Series & Dutro 7-Ton (XZU300, XZU400, XZU410, XZU420, XZU500, XZU600, XZU650, XZU710, XZU720, WU410 Commercial Cargo Lorries, Wooden Body Trucks, Tippers & Box Vans)

  • Hino 300 Series (4.0L & 4.1L Euro 2 / Euro 3 / Euro 4 / Euro 5 Turbo Diesel Models)

  • Hino Liesse & Poncho Minibus Series

• TOYOTA COMMERCIAL TRUCKS & BUSES:

  • Dyna & Toyoace 200 / 300 / 400 Series (XZU300–XZU700 series running N04C / S05C engines)

  • Coaster Commercial Bus Series (XZB40, XZB50 running N04C engines)

• Engine Application:

  • Hino N04C / N04C-T / N04C-TB / N04C-TC / N04C-TJ / N04C-TK / N04C-TQ / N04C-TR / N04C-TV / N04C-TW / N04C-UH (4.0L & 4.1L Inline-4 16V Common Rail Turbo Diesel)

  • Hino / Toyota S05C (4.6L / 4,613cc Inline-4 Diesel)

  • Toyota S05D (4.9L / 4,899cc Inline-4 Diesel)

  • Hino W04C (Select compatible variants)

• OEM & Cross-Reference Part Numbers:

  • 16100-78170 / 1610078170 (Hino / Toyota Genuine OEM)

  • 16100-E0780 / 16100E0780

  • 16100-E0040 / 16100E0040

  • 16100-E0042 / 16100E0042

  • 16100-E0B60 / 16100E0B60

  • 16100-4080 / 161004080

  • S1610-078170 / S1610-0E0780

  • YY: HWP-054 / HWP054

  • GF: GF-HI113 / GFHI113

• (Note: Hino Dutro water pumps have distinct body configurations: earlier W04D models use a cast iron 7-hole base [16100-78101], whereas this 16100-78170 / 16100-E0780 [HWP-054] unit features an aluminum alloy body with an 8-hole mounting base, 6-vane open impeller, and 79mm / 40mm 4-hole top hub. Always count your mounting bolt holes [8 holes] and verify the 79mm top hub prior to ordering.)

Why Choose Our Commercial Truck Parts?

• Pre-Installed 79mm / 40mm 4-Hole Flange Hub: Factory-pressed, CNC-machined steel hub with 4 tapped bolt holes ensures concentric pulley/fan clutch alignment, eliminating vibration and belt wobble.

• Lightweight Die-Cast Aluminum Body: Precision-cast aluminum alloy housing provides high heat dissipation efficiency and corrosion resistance while reducing overall front engine weight.

• High-Flow 6-Vane Open Impeller: Dynamically balanced 6-blade cast iron impeller delivers continuous, high-volume coolant flow under heavy turbo boost and stop-and-go commercial driving.

• Heavy-Duty Bearing & Mechanical Seal: High-capacity sealed bearing cartridge and wear-resistant silicon carbide/carbon shaft seal resist high cooling system pressures and eliminate coolant weepage.

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

Need Help Confirming Fitment?

Unsure whether this 16100-78170 water pump matches your Dutro or Dyna truck engine setup?

• Check your old pump against the 79mm / 40mm 4-hole top hub, 8-hole mounting base, and 6-vane open impeller shown in our pictures.

• Or send your Chassis Number (VIN) / Engine Model (N04C / S05C) / Base Bolt Hole Count (8 holes) / sample photos to our team via WhatsApp for instant confirmation!