1990 Hyundai Excel GLS, StandardFACTORY OEM SERVICE PROCEDURE

Service Intervals & Specifications: Notes

REPLACEMENT INTERVALS

Component Interval (Miles)
Air Filter 30,000
Automatic Transaxle Fluid 30,000
Belts 50,000
Brake Fluid 30,000
Coolant 30,000
Fuel Filter 50,000
Fuel & Vapor Hoses 50,000
Oil & Filter 7,500
O2 Sensor 50,000
Spark Plugs 30,000
Timing Belt 60,000
DRIVE BELT ADJUSTMENT

Application (1) Deflection In. (mm)
Excel
A/C Belt .18-.22 (4.5-5.5)
Alternator Belt .28-.32 (7.1-8.1)
Sonata (2.4L)
A/C Belt .35-.43 (8.9-10.9)
Alternator Belt .35-.41 (8.9-10.4)
P/S Belt .28-.39 (7.1-9.9)
Sonata (3.0L)
A/C Belt .35-.43 (8.9-10.9)
Alternator & P/S Belt .24-.35 (6.1-8.9)
(1) Deflection with 22 lbs. (10 kg) pressure applied midway on 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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