Toyota HD engine
This article relies largely or entirely on a single source. (January 2019)
|Toyota HD engine|
1989 Toyota 1HD-T engine
|Manufacturer||Toyota Motor Company|
|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|
|Turbocharger||Yes, with intercooler (some versions)|
|Fuel system||Direct injection|
|Power output||164–202 hp (122–151 kW; 166–205 PS)|
|Torque output||361–430 N⋅m (266–317 lb⋅ft)|
The 1HD-T is a 12 valve 4.2 L (4,164 cc) straight-6 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. 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.[clarification needed]
- 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
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.[clarification needed]
- Land Cruiser, HDJ80, 1995
- Coaster, HDB50, July 1995 – July 1999
- Land Cruiser, HDJ80, July 1995 – July 1999
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 164 hp (122 kW; 166 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.
- 1HZ, 1HD-T Engine repair manual (NCF064E ed.). Toyota Motor Company. Feb 1990. p. 14.
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