1. Check the housing-to-outer rotor radial clearance between the outer rotor (A) and pump housing (B). If the housing-to-outer rotor radial clearance exceeds the service limit, replace the oil pump.

   Housing-to-Outer Rotor Radial Clearance
   K20Z2 Engine:
   Standard (New): | 0.035−0.090 mm (0.0014−0.0035 in.)
   Service Limit: | 0.23 mm (0.009 in.)
   K24A3 Engine:
   Standard (New): | 0.15−0.21 mm (0.006−0.008 in.)
   Service Limit: | 0.23 mm (0.009 in.)

1. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if necessary.