1996 Isuzu Trooper S, AutomaticFACTORY OEM SERVICE PROCEDURE

Service Intervals & Specifications: Notes

REPLACEMENT INTERVALS (1)

Component Miles
Air Filter
Normal Service 30,000
Severe Service (2) 15,000
Coolant (3)
Engine Oil & Filter
Normal Service 7500
Severe Service 3750
Fuel Filter 30,000
PCV Valve (4) 100,000
Spark Plugs
Normal Service 60,000
Severe Service 60,000
Spark Plug Wires
Normal Service 60,000
Severe Service 60,000
Automatic Transmission Fluid
Normal Service (3)
Severe Service 20,000
Manual Transmission Fluid (5)
Transfer Case Fluid (4WD) (5)
Front Differential Fluid (4WD) (5)
Rear Differential Fluid (5)
Repack Front Wheel Bearings (2WD)
Normal Service 30,000
Replace Timing Belt (6) 60,000
Replace Brake Fluid 45,000
Replace Power Steering Fluid 30,000
Rotate Tires & Check Brakes 7500
(1) Different interval is required for normal and severe service. Severe service is described as trailer towing, off-highway operation, snow removal operation, or operating in dusty or excessively hot conditions.
(2) Inspect air filter every 15,000 miles and replace as necessary. Replace at 30,000 miles unless previously replaced during inspection.
(3) Replace fluid at 45,000 miles or 36 months whichever occurs first. Replace fluid at 36 months regardless of mileage. After first fluid change, replace fluid every 24 months or 30,000 miles thereafter.
(4) Inspect at scheduled interval and replace as necessary.
(5) Replace fluid at 15,000 miles. After first fluid change, replace fluid every 30,000 miles thereafter.
(6) Inspect water pump (where applicable).
VALVE CLEARANCE ADJUSTMENT INTERVALS

Application Miles
Trooper (1)
(1) Hydraulic lash adjusters are used. No adjustment is required.
BELT ADJUSTMENT (1)

Application Specification
Belt Deflection (2)
A/C Belt .315" (8 mm)
Generator & Power Steering Belt N/A
Belt Tension (3)
A/C Belt 100-120 lbs. (45-64 kg)
Alternator & Fan Belt 100-120 lbs. (45-54 kg)
P/S Belt 70-110 lbs. (32-50 kg)
(1) Some models are checked by belt deflection; other models are checked using belt tension gauge.
(2) Deflection is checked with 22 lbs. (10 kg) pressure applied midway on longest belt run.
(3) Belt tension checked with belt tension gauge.
Factory Service Tools

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When to See a Mechanic

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  • • 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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