1990 Eagle Summit Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Service Intervals & Specifications

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1990 Mitsubishi Van, 1990 Mitsubishi Sigma, 1990 Mitsubishi Precis, 1990 Mitsubishi Pickup, and 1990 Mitsubishi Montero. However, it is still accessible from the selected car via links, so may be relevant.
REPLACEMENT INTERVALS

Component Interval (Miles)
Mirage
Air Filter 30,000
Automatic Transaxle Fluid 30,000
Belts 30,000
Coolant 30,000
Fuel & Vapor Hoses 50,000
Oil 7,500
Oil Filter 15,000
Spark Plugs 30,000
Timing Belt 60,000
Eclipse
Air Filter 30,000
Automatic Transaxle Fluid 30,000
Belts 30,000
Coolant 30,000
Fuel & Vapor Hoses 50,000
Oil
Non-Turbo 7,500
Turbo 5,000
Oil Filter
Non-Turbo 15,000
Turbo 10,000
Spark Plugs 30,000
Timing Belt 60,000
Galant
Air Filter 30,000
Automatic Transaxle Fluid 30,000
Belts 30,000
Coolant 30,000
Fuel & Vapor Hoses 50,000
Oil 7,500
Oil Filter 15,000
Rear Axle Fluid 30,000
Spark Plugs 30,000
Timing & Balance Shaft Belts 60,000
Montero
Air Filter 30,000
Automatic Transmission Fluid 30,000
Belts 30,000
Coolant 30,000
EGR Valve (1) 50,000
Front & Rear Axle Fluid 30,000
Fuel Filter 50,000
Fuel & Vapor Hoses 50,000
Oil 7,500
Oil Filter 15,000
O2 Sensor 80,000
Spark Plugs 30,000
Spark Plug Wires (1) 60,000
Timing Belt 60,000
Transfer Case Fluid 30,000
Vapor Canister (1) 100,000
Pickup
Air Filter 30,000
Automatic Transmission Fluid 30,000
Belts 30,000
Coolant 30,000
EGR Valve (2.4L) (1) 50,000
Front & Rear Axle Fluid 30,000
Fuel Filter 50,000
Fuel & Vapor Hoses 50,000
Oil 7,500
Oil Filter 15,000
O2 Sensor (1) 80,000
Spark Plugs 30,000
Spark Plug Wires (1) 60,000
Timing Belt 60,000
Transfer Case Fluid 30,000
Vapor Canister (1) 100,000
Precis
Air Filter 30,000
Automatic Transaxle Fluid 30,000
Belts 60,000
Brake Fluid 30,000
Coolant 30,000
Fuel Filter 60,000
Fuel & Vapor Hoses 60,000
Oil & Filter 7,500
O2 Sensor 60,000
Spark Plugs 30,000
Timing Belt 60,000
Vapor Canister 60,000
Sigma
Air Filter 30,000
Automatic Transaxle Fluid 30,000
Belts 30,000
Coolant 30,000
Fuel & Vapor Hoses 50,000
Oil & Filter 7,500
Spark Plugs 60,000
Timing & Balance Shaft Belts 60,000
Van/Wagon
Air Filter 30,000
Belts 30,000
Coolant 30,000
EGR Valve (1) 50,000
Fuel & Vapor Hoses 50,000
Oil 7,500
Oil Filter 15,000
O2 Sensor (1) 80,000
Spark Plugs 60,000
Spark Plug Wires (1) 60,000
Timing Belt 60,000
Vapor Canister 100,000
(1) Federal models only.
DRIVE BELT ADJUSTMENT

Application (1) Deflection In. (mm)
Mirage
1.5L .28-.35 (7.1-8.9)
1.6L .35-.45 (8.9-11.4)
Eclipse
1.8L .26-.31 (6.5-8.0)
2.0L .28-.34 (7.1-8.6)
Galant .28-.34 (7.1-8.6)
Montero
2.6L .35-.47 (8.9-11.9)
3.0L .22-.32 (5.6-8.1)
Pickup
2.0L .28-.39 (7.1-9.9)
2.6L .35-.47 (8.9-11.9)
Precis
A/C Belt .18-.22 (4.5-5.6)
Alternator Belt .28-.32 (7.1-8.1)
Sigma .16-.20 (4.1-5.1)
Van/Wagon .28-.40 (7.1-10.2)
(1) Deflection with 22 lbs. (10 kg) pressure applied midway on belt run.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.