Toyota HD engine
The Toyota HD is a series of Diesel engines produced by Toyota.
| Toyota HD engine | |
|---|---|
 1989 Toyota 1HD-T engine | |
| Overview | |
| Manufacturer | Toyota Motor Company |
| Layout | |
| Configuration | Straight-6 |
| Displacement | 4.2 L (4,164 cc) |
| Cylinder bore | 94 mm (3.70 in) |
| Piston stroke | 100 mm (3.94 in) |
| Valvetrain | SOHC 12 & 24 valves |
| Compression ratio | 18.6:1, 18.8:1 |
| RPM range | |
| Max. engine speed | 4200 |
| Combustion | |
| Turbocharger | Yes, with intercooler (some versions) |
| Fuel system | Direct injection |
| Fuel type | Diesel |
| Cooling system | Water-cooled |
| Output | |
| Power output | 164–420 hp (122–313 kW; 166–426 PS) |
| Torque output | 361–430 N⋅m (266–317 lb⋅ft) |
1HD-T
The 1HD-T is a 12 valve 4.2 L (4,164 cc) straight-6 SOHC turbocharged diesel engine of direct injection design.[1] Bore and stroke is 94 mm × 100 mm (3.70 in × 3.94 in), with a compression ratio of 18.6:1. Output is 164 hp (122 kW; 166 PS) at 3,600 rpm with 361 N⋅m (266 lb⋅ft) of torque at 1,400 rpm.
- Coaster, HDB20, January 1990 – January 1993
- Coaster, HDB30, January 1990 – January 1993
- Coaster, HDB50, January 1993 – January 1995
- Land Cruiser, HDJ80, January 1990 – January 1995
1HD-FT
The 1HD-FT is a 4.2 L (4,164 cc) straight-6 24 valve SOHC turbocharged diesel engine of direct injection design. Bore and stroke is 94 mm × 100 mm (3.70 in × 3.94 in), with a compression ratio of 18.6:1. Known as the "multivalve" it has 4 valves per cylinder (2 inlet, 2 exhaust), central vertically mounted injector, and no glow plugs but rather an intake glow screen heater (like the later electronic 1HD-FTE below). The 4 valves per cylinder are actuated by the SOHC, by using bridges so each rocker actuates a pair of valves. Output is 168 hp (125 kW; 170 PS) ECE at 3,600 rpm with 380 N⋅m (280 lb⋅ft) of torque ECE at 2,500 rpm. However, marinized version of 1HD (sold as Yamaha ME and Yanmar 6LP) have an output of 315 hp (235 kW; 319 PS) on Yanmar 6LP and 315 hp (235 kW; 319 PS), 370 hp (276 kW; 375 PS) or 420 hp (313 kW; 426 PS) on Yamaha ME.[2][3][4][5]
1HD-FTE
The 1HD-FTE is a 4.2 L (4,164 cc) straight-6 24 valve turbocharged diesel engine. Bore and stroke is 94 mm × 100 mm (3.70 in × 3.94 in), with a compression ratio of 18.8:1. Output is 167 hp (125 kW; 169 PS) at 3,400 rpm with 380 N⋅m (280 lb⋅ft) of torque at 1,400 rpm. The fuel system is direct injection, and adopts the electronic fuel injection (EFI) system. Redline of this engine is at 4200 rpm.
The 4 valves per cylinder are actuated by the SOHC, by using bridges so each rocker actuates a pair of valves.
The version with intercooler as fitted to HDJ100 station wagons has 202 hp (151 kW; 205 PS) at 3400 rpm with 430 N⋅m (317 lb⋅ft) of torque at 1200-3200 rpm with a redline reaching 4000 rpm. A lower output 122 kW (164 hp; 166 PS) non-intercooled version powers HDJ78 Troop Carrier and HDJ79 Utility versions.
Also some of the HDB50 and HDB51 Coasters are fitted with this 1HD-FTE engine.
References
- 1HZ, 1HD-T Engine repair manual (NCF064E ed.). Toyota Motor Company. Feb 1990. p. 14.
- "Help me cross reference my 1HD-T/Yanmar 6LPA-DTP". IH8MUD Forum. 20 December 2012. Retrieved 28 April 2022.
- "Yamaha Inboard Diesel-6Cyl 315hp - RIBnet Forums". www.rib.net.
- "Yanmar 6LP STZE - RIBnet Forums". www.rib.net. Retrieved 28 April 2022.
- "Yamaha ME420 engines". YBW Forum. Retrieved 28 April 2022.
