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Home >> Honda >> 1983 >> Prelude Automatic >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.3L 4-CYL, 1.5L 4-CYL, 1.75L 4-CYL & 1.8L 4-CYL >> Engine Oiling >> Oil Pump >> Inspection

Oil Pump: Inspection

  1. Thoroughly clean and inspect all parts for wear or damage. On pumps with 2 sets of rotors and relief valve assemblies, inspection procedures and specifications apply to both sets.
  2. With rotors installed in housing, use a feeler gauge to check clearance between inner rotor lobe and outer rotor. Compare measurement with specifications.
  3. With rotors installed in housing, use a feeler gauge to check clearance between outer rotor and housing. Compare measurement with specifications.
  4. Place rotors in housing. Lay housing gasket over housing and lay a straightedge over gasket. Insert a feeler gauge between straightedge and rotor assembly to measure rotor end play. Compare measurement with specifications.
  5. Check fit of relief valve in its bore. Valve must slide freely in bore. If valve is scored, replace it. Check free length of relief valve spring.
OIL PUMP SPECIFICATIONS

Application Standard In. (mm) Service Limit In. (mm)
Rotor Lobe Clearance .002-.006 (.04-.14) .008 (.20)
Outer Rotor to Housing .004-.007 (.10-.18) .008 (.20)
Rotor End Play .001-.004 (.03-.10) .006 (.15)
Spring Free Length 2.00-2.10 (50.8-53.3) 2.00 (50.0)
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