Engine Isuzu 4ZD1

The 2.3-liter Isuzu 4ZD1 carburetor engine was assembled by the company from 1985 to 1997 and was installed on a number of popular SUVs and pickup trucks of the concern, such as Trooper, Mu, Faster. On the American version of the Impulse coupe, an injection modification of this unit is found.

Engines of the Z-series: 4ZD1, 4ZE1.


Production years 1985-1997
Displacement, cc 2255
Fuel system carburetor
Power output, hp 90 – 110
Torque output, Nm 165 – 185
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 89.3
Piston stroke, mm 90
Compression ratio 8.3
Features SOHC
Hydraulic lifters no
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 4.4
Fuel type petrol
Euro standards EURO 1
Fuel consumption, L/100 km (for Isuzu Trooper 1988)
— city
— highway
— combined
Engine lifespan, km ~275 000
Weight, kg 150

The engine was installed on:

  • Isuzu Faster 2 (KB) in 1985 – 1988; Faster 3 (TF) in 1988 – 1997;
  • Isuzu Impulse 1 (JR) in 1988 – 1990;
  • Isuzu MU 1 (UC) in 1989 – 1993;
  • Isuzu Trooper 1 (UB1) in 1986 – 1991;
  • Isuzu Wizard 1 (UC) in 1989 – 1993.

Disadvantages of the Isuzu 4ZD1 engine

  • This is a simple, reliable, but very rare motor and there may be problems with its maintenance.
  • Most of the problems with this engine are due to wear and tear due to its age.
  • Due to contamination of the throttle assembly, idle speeds often float here.
  • The fuel pump and the archaic ignition system are also distinguished by a modest resource.
  • It is necessary to adjust the valve clearances and change the timing belt every 100,000 km.

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