Toyota HD engine#1HD-FTE
{{short description|Toyota diesel engine series}}
{{self published|date=July 2025}}
{{Infobox automobile engine
|name=Toyota HD engine
|image=1989 Toyota 1HD-T Type engine front.jpg
|caption=1989 Toyota 1HD-T engine
|manufacturer=Toyota
|configuration=Straight-6
|valvetrain=SOHC, 12 & 24 valves
|turbocharger=Yes, with intercooler (some versions){{which|date=July 2025}}
|fueltype=Diesel
|fuelsystem=Direct injection
|coolingsystem=Water-cooled
|displacement={{cvt|4164|cc|L|1|disp=flip}}
|bore={{cvt|92|mm|in|2}}
|stroke={{cvt|100|mm|in|2}}
|compression=18.6:1, 18.8:1
|redline=4400 rpm
|power={{cvt|164-420|hp|kW PS|0}}
|torque={{cvt|361-430|Nm|lbft|0}}
}}
The Toyota HD is a series of diesel engines produced by Toyota.
1HD-T
The 1HD-T is a 12-valve {{cvt|4164|cc|L|1|disp=flip}} straight-6 SOHC turbocharged direct injection diesel engine.{{cite book|title=1HZ, 1HD-T Engine repair manual|date=Feb 1990|publisher=Toyota Motor Company|page=14|edition=NCF064E}} Bore and stroke is {{cvt|94x100|mm|in|2}}, with a compression ratio of 18.6:1. Output is {{cvt|164|hp|kW PS|0}} at 3,600 rpm with {{cvt|361|Nm|lbft|0}} of torque at 1,400 rpm.
- Coaster, HDB20, January 1990{{Snd}} January 1993{{Clarify |date=February 2020 |reason=Describe the following list. Are they variants, vehicles in which they were used (what is HDB20?}}
- Coaster, HDB30, January 1990{{Snd}} January 1993
- Coaster, HDB50, January 1993{{Snd}} January 1995
- Land Cruiser, HDJ80, January 1990{{Snd}} January 1995
1HD-FT
The 1HD-FT is a {{cvt|4164|cc|L|1|disp=flip}} straight-6 24-valve SOHC turbocharged direct injection diesel engine. Bore and stroke is {{cvt|94x100|mm|in|2}}, 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 {{cvt|168|hp|kW PS|0}} ECE at 3,600 rpm with {{cvt|380|Nm|lbft|0}} of torque ECE at 2,500 rpm. However, marinized version of 1HD (sold as Yamaha ME and Yanmar 6LP) have an output of {{cvt|315|hp|kW PS|0}} on Yanmar 6LP and {{cvt|315|hp|kW PS|0}}, {{cvt|370|hp|kW PS|0}} or {{cvt|420|hp|kW PS|0}} on Yamaha ME.{{cite web |title=Help me cross reference my 1HD-T/Yanmar 6LPA-DTP |url=https://forum.ih8mud.com/threads/help-me-cross-reference-my-1hd-t-yanmar-6lpa-dtp.671784/ |website=IH8MUD Forum |date=20 December 2012 |access-date=28 April 2022}}{{cite web |title=Yamaha Inboard Diesel-6Cyl 315hp |url=https://www.rib.net/forum/f36/yamaha-inboard-diesel-6cyl-315hp-49717.html |website=rib.net |access-date=10 July 2025}}{{cite web |title=Yanmar 6LP STZE |url=https://www.rib.net/forum/f36/yanmar-6lp-stze-80790.html |website=rib.net |access-date=28 April 2022}}{{cite web |title=Yamaha ME420 engines |url=https://forums.ybw.com/threads/yamaha-me420-engines.173045/ |website=YBW Forum |date=3 September 2008 |access-date=28 April 2022}}
- Land Cruiser, HDJ80, 1995{{Clarify |date=February 2020 |reason=Describe the following list. Are they variants, vehicles in which they were used (what is HDJ80? Source?}}
- Coaster, HDB50, July 1995{{Snd}} July 1999
- Land Cruiser, HDJ80, July 1995{{Snd}} July 1999
- Yanmar 6LP and Yamaha ME diesel engine (marinized version of 1HD-FT).
1HD-FTE
The 1HD-FTE is a {{cvt|4164|cc|L|1|disp=flip}} straight-6 24-valve turbocharged diesel engine. Bore and stroke is {{cvt|94x100|mm|in|2}}, with a compression ratio of 18.8:1. Output is {{cvt|167|hp|kW PS|0}} at 3,400 rpm with {{cvt|380|Nm|lbft|0}} 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 {{cvt|202|hp|kW PS|0}} at 3400 rpm with {{cvt|430|Nm|lbft|0}} of torque at 1200-3200 rpm with a redline reaching 4200 rpm. A lower output {{cvt|122|kW|hp PS|0}} non-intercooled version powers HDJ78 Troop Carrier and HDJ79 Utility versions.
Some of the HDB50 and HDB51 Coasters are fitted with this 1HD-FTE engine.
References
{{commons category|Toyota HD engines}}
{{Reflist}}
{{DEFAULTSORT:Toyota Hd Engine}}
Category:Diesel engines by model
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