Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1989 Isuzu Impulse L4-2.3L (4ZD1)FACTORY OEM SERVICE PROCEDURE
System Specifications
TYPE:
Standard GL-5(Gear Oil, API Service GL-5)
Limited-Slip GL-5*
Above 50°F (10<)>C) 140
0° to 90°F (-18° to 32°C) 90
Below 50°F (10°C) 80
* Special Lubricant for Limited Differentials
CAPACITY, Refill:
1988-89 All 1.5 liters 3.2 pt
1984-86 ex. Turbo 1.0 liters 2.2 pt
1984-86 Turbo 1.5 liters 3.2 pt
1982-83 1.3 liters 2.7 pt
Standard GL-5(Gear Oil, API Service GL-5)
Limited-Slip GL-5*
Above 50°F (10<)>C) 140
0° to 90°F (-18° to 32°C) 90
Below 50°F (10°C) 80
* Special Lubricant for Limited Differentials
CAPACITY, Refill:
1988-89 All 1.5 liters 3.2 pt
1984-86 ex. Turbo 1.0 liters 2.2 pt
1984-86 Turbo 1.5 liters 3.2 pt
1982-83 1.3 liters 2.7 pt
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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