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Home >> Isuzu >> 1983 >> Impulse Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.8L 4-CYL - VIN [B],1.9L [A], 1.95L 4-CYL - VIN [A] >> Engine Lubrication >> Oil Pump >> Inspection

Oil Pump: Inspection

  1. Using a feeler gauge, measure tip clearance between inner and outer rotors. Standard rotor clearance is .0005-.0059" (.013-.150 mm). Replace oil pump if clearance is not within limits.
  2. Using a feeler gauge, measure clearance between outer rotor and inner wall of pump housing. Standard value is .006-.009" (.16-.22 mm). Replace oil pump if clearance is not within limits.
  3. Install both gears in pump housing. Lay a straightedge over pump housing. Insert a feeler gauge between straightedge and rotors. Measure clearance over rotors. Standard clearance is .001-.004" (.03-.09 mm). If clearance is excessive, replace oil pump.
OIL PUMP SPECIFICATIONS

Application Measurement - In. (mm)
Rotor Tip Clearance .008 Max. (.20)
Rotor-to-Pump Housing .009 Max. (.25)
Rotor-to-Pump Cover .008 Max. (.20)
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