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Home >> Mitsubishi >> 1990 >> Eclipse Base, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.8L 4-CYL - VIN (T), 2.0L VIN (R,U,V) & 2.4L VIN (W) 4-Cylinder >> Engine Lubrication >> Oil Pump & Front Cover >> Inspection (1.8L Eclipse)

Inspection (1.8L Eclipse)

  1. Inspect components for damage. Install oil pump gears in front cover. Using feeler gauge, measure gear-to-front cover clearance between tip of teeth on each gear and front cover.
  2. Place straightedge across front cover above oil pump gears. Using feeler gauge, check gear side clearance between straightedge and both oil pump gears. Check for ridge on oil pump cover in gear operating area. Ensure relief plunger slides freely in bore. Check free length and spring pressure of relief plunger spring. Replace components if not within specification. See OIL PUMP SPECIFICATIONS (1.8L ECLIPSE) table.
OIL PUMP SPECIFICATIONS (1.8L ECLIPSE)

Application Specification
Gear Side Clearance
Drive Gear
Standard .0039-.0063" (.099-.160 mm)
Limit .0079" (.201 mm)
Driven Gear
Standard .0008-.0020" (.020-.051 mm)
Limit .0059" (.149 mm)
Gear-to-Front Cover Clearance
Drive Gear
Standard .0024-.0047" (.061-.119 mm)
Limit .0079" (.201 mm)
Driven Gear
Standard .0016-.0047" (.041-.119 mm)
Limit .0071" (.180 mm)
Relief Plunger Spring
Free Length 1.724" (43.79 mm)
Spring Pressure 8.2 lbs. @ 1.5787" (3.7 kg @ 40.098 mm)