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 |
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
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
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]