1990 Infiniti M30FACTORY OEM SERVICE PROCEDURE

Service Intervals & Specifications

REPLACEMENT INTERVALS (1)

Component Interval (Miles)
Oil & Filter 7500
Air Filter 30,000
Coolant 30,000
Fuel Filter 30,000
Spark Plugs (2) 60,000
Timing Belt (3) 60,000
(1) More often under severe operating conditions.
(2) Platinum tip.
(3) V6 models.
BELT ADJUSTMENT - V6

Application (1) Deflection In. (mm)
A/C Compressor 11/32 (9)
Alternator 5/16 (8)
Power Steering 9/16 (14)
(1) Deflection is with 22 lbs. (10 kg) pressure applied midway on longest belt run.
BELT ADJUSTMENT - V8

Application (1) Deflection In. (mm)
A/C Compressor 11/32 (9)
Alternator 11/32 (9)
Power Steering
With HICAS 9/32 (7)
Without HICAS 11/32 (9)
(1) Deflection is with 22 lbs. (10 kg) pressure applied midway on longest belt run.
Factory Service Tools

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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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