Toyota H engine

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The Toyota H engine was first produced in 1967 but did not reach road cars until 1972. The 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.

Contents

Toyota H engine
Overview
Manufacturer Toyota Motor Company
Production1967-1990
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

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

2H

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.

Applications

12H-T

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]

References

  1. 1 2 "'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.
  2. ↑ 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.
  3. ↑ "Toyota 12H-T (4.0 L) turbo diesel engine: specs and review, service data". Engine Specs. 2019-05-24. Retrieved 2022-06-18.
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