Summary
The Toyota H engine was first produced in 1967 but did not reach road cars till 1972. It is not a successor to the older and larger Toyota D engine.
H engine was then replaced by the 2H engine and the 12H-T turbo engine. It was succeeded by the more advanced SOHC HZ series engine.
| Toyota H engine | |
|---|---|
| Overview | |
| Manufacturer | Toyota Motor Company |
| Production | 1967-1990 |
| Layout | |
| Configuration | Straight-6 |
| Displacement | 3.6 L (3,576 cc) 4.0 L (3,980 cc) |
| Cylinder bore | 88 mm (3.46 in) 91 mm (3.58 in) |
| Piston stroke | 98 mm (3.86 in) 102 mm (4.02 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Cast iron |
| Valvetrain | OHV with 2 valves per cylinder |
| Valvetrain drive system | Timing gears |
| Compression ratio | 18.6:1-22.0:1 |
| RPM range | |
| Idle speed | 650-750 rpm |
| Combustion | |
| Turbocharger | Toyota CT26 on 12H-T |
| Fuel system | Mechanical fuel injection Direct injection |
| Fuel type | Diesel |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 91–138 PS (90–136 hp; 67–101 kW) |
| Torque output | 205–313 N⋅m (21–32 kg⋅m; 151–231 lb⋅ft) |
| Chronology | |
| Predecessor | Toyota D engine |
| Successor | Toyota HZ engine |
H edit
The H is a 3.6 L (3,576 cc) inline 6, 12-valve OHV diesel engine.[1] Bore is 88 mm and stroke is 98 mm, with a compression ratio of 21:1. Output is 95 PS (70 kW) at 3,600 rpm with 22.0 kg⋅m (216 N⋅m; 159 lb⋅ft) of torque at 2,200 rpm.[1]
Applications
- Toyota Land Cruiser HJ45
- Toyota Dyna HU15 HU30
- Toyota Weapon carrier HQ15
2H edit
The 2H is a 4.0 L (3,980 cc) inline 6, 12 valve OHV indirect injection diesel engine. Bore is 91 mm and stroke is 102 mm, with a compression ratio of 20.7:1. Output is 105 PS (77 kW) at 3,500 rpm - later production years 107 hp (80 kW) with 177 lb·ft (240 N·m) of torque at 2,000 rpm. This engine weighs 330 kg (728 lb) in European trim from 1985.[2] Compared to its predecessor, the 2H proved to be much more reliable, running 1 million kilometers or more.
Applications
- Toyota Land Cruiser HJ47, HJ60, HJ75
- Toyota Dyna HU20, 30, 40, 50
- Toyota Coaster HB20, 30
12H-T edit
The 12H-T is a 4.0 L (3,980 cc) inline 6, 12 valve OHV turbocharged direct injection diesel engine. Bore is 91 mm and stroke is 102 mm, with a compression ratio of 18.6:1. Output is 134 hp (100 kW) at 3500 rpm with 232 lb·ft (315 N·m) of torque at 1,800 rpm, on the stock configuration of 7PSI of boost.[3]
- Toyota Land Cruiser HJ61
- Toyota Coaster HB20, 30
References edit
- ^ a b "'69 商業車: ニューモデル" ['69 commercial vehicles: New models]. 月刊自動車 [The Motor Monthly] (in Japanese). 11 (8): 122. August 1969. 3439.
- ^ Visart, Etienne, ed. (1985-02-07). "Nieuw in 1985 (1)" [New for 1985 (1)]. De AutoGids (in Flemish). Vol. 6, no. 140. Brussels, Belgium: Uitgeverij Auto-Magazine. p. 116.
- ^ "Toyota 12H-T (4.0 L) turbo diesel engine: specs and review, service data". Engine Specs. 2019-05-24. Retrieved 2022-06-18.