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The Toyota 1HZ is a straight-six diesel engine developed and produced by Toyota Motor Corporation beginning in 1990. It continues to be offered in vehicles sold in countries with lax emissions regulations, and those sold by Toyota Gibraltar Stockholdings for organisations such as the United Nations.
Reciprocating internal combustion engine
Toyota HZ engine
A Toyota 1HZ engine installed in the Land Cruiser.
Overview
Manufacturer
Toyota Motor Company
Production
1990–present
Layout
Configuration
Straight-6
Displacement
4.2 L (4,164 cc)
Cylinder bore
94 mm (3.70 in)
Piston stroke
100 mm (3.94 in)
Cylinder block material
Cast iron
Cylinder head material
Cast iron
Valvetrain
SOHC with 2 valves per cylinder
Valvetrain drive system
Timing belt
Compression ratio
22.4:1
RPM range
Max. engine speed
4000
Combustion
Fuel system
Mechanical fuel injection
Fuel type
Diesel
Oil system
Wet sump
Cooling system
Water-cooled
Output
Power output
131 PS (129 hp; 96 kW)
Torque output
285 N⋅m (29 kg⋅m; 210 lb⋅ft)
Chronology
Predecessor
Toyota H engine
Bottom view of the 1HZ headBottom view of 1HZ/1HDT connecting rods and crankFront view of 1HZ/1HDT timing gears (1HZ uses a timing belt to drive the camshaft).
The 1HZ generates more power and torque than the previous 2H diesel engine. Despite being 30 years old, the 1HZ still sees use in Landcruiser 70 Series production worldwide with the exception of petrol-only markets and Euro 4 and Australian markets, where the 1GR-FE and 1VD-FTV Turbo-Diesel is supplied respectively. A popular engine in the 80 series Land Cruiser, it replaced the 2H engine in the 80/85 series by 1990.
The 1HZ Toyota Landcruiser 4.2 litre (4164 cc) diesel inline 6-cylinder 12-valve SOHC (single overhead camshaft) is of the IDI or indirect injection design, and delivers maximum power of
96 kW (129 hp) at 3800 rpm and maximum torque of 285 N⋅m (210 lbf⋅ft) at 2200 rpm.
The 5-cylinder variant of this engine is known as 1PZ.
5-cylinder variant of this engine is known as 1PZ. Toyota KZ engine Wikimedia Commons has media related to ToyotaHZengines. Rebuilding a 1HZ Motor Archived...
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 [ja]...
The Toyota Land Cruiser (Japanese: トヨタ・ランドクルーザー, Hepburn: Toyota Rando-Kurūzā) (also sometimes spelled as LandCruiser) is a series of four-wheel drive...
Every Toyota vehicle has a model code which describes the basic vehicle (e.g. Corolla), its generation and major options (engine type, gearbox type, body...
intensity by 40% compared to the 2.4 L engine and change the noise signature into a higher frequency above 2,000 Hz. The engine also uses a variable-displacement...
is due to the mains' fixed frequency of either 50 Hz (Europe), or 60 Hz (United States). The engine's crankshaft rotational frequency is chosen so that...
through the HX and HZ series. Detuned engines adhering to government emission standards were brought in with the HX series, whilst the HZ brought considerably...
The LE was offered with Toyota's 1.4-litre 60-kilowatt (80 hp) engine (hatchback only) and 1.6-litre 67-kilowatt (90 hp) engine, in Holden's traditional...
being felt. Hence, when Holden decided to replace the successful full-size HZ Kingswood with a new model line, they wanted the new car to be smaller and...
The experiment consisted of making audio recordings of a Toyota Prius and combustion engine Honda Accord approaching from two directions at 5 miles per...
640×480 (interpolated), 320×240 (actual) 60 Hz for NTSC version, and 768×576 (interpolated), 384×288 (actual) 50 Hz for PAL version with either 16-bit palettized...
Achieva, and Pontiac Grand Am, as a competitor to the Honda Accord and Toyota Camry which were the best sellers in the mid-size market.[citation needed]...
suspension provides an active response to road features up to approximately 3 Hz, a limit imposed by minimizing the size of the additional hardware and power...
Abuelsamid, Sam (August 22, 2010). "Tesla to buy old resources from GM, Toyota for NUMMI plant". Auto Blog. Retrieved 20 August 2015. Fourie, Louis F....
inspired by the Toyota Sera. The engine produces high temperatures under full application and thus causes a high temperature variation in the engine bay from...
the Holden HZ series and featured V8 engines only, along with a four-headlight grille and under bumper front spoiler. In 1979, a basic HZ Holden panel...
plan coming into effect, it was replaced by the Holden Nova, a rebadged Toyota Corolla. In 1995, Holden commenced selling the TR Astra in New Zealand....
engine that was also installed into the Australian-produced versions of the Toyota Corona and in four-cylinder versions of the Holden Commodore. This sluggish...
It was not sold in Australia, where Holden instead offered a rebadged Toyota Camry called Apollo until 1997. In Japan, the Vectra (and Omega) were the...
Courier SHOOTER Canada SHS Shura Air Transport Services SHURA AIR Ethiopia HZ SHU Sakhalinskie Aviatrassy (SAT) SATAIR Russia SP SAT SATA Air Acores SATA...
significantly and the model was discontinued in 1989. The Holden Apollo, a rebadged Toyota Camry, was introduced as the Australian market replacement, with New Zealand...
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