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

   Inner Rotor-to-Outer Rotor Radial Clearance
   K20Z2 Engine:
   Standard (New): | 0.10−0.17 mm (0.004−0.007 in.)
   Service Limit: | 0.20 mm (0.008 in.)
   K24A3 Engine:
   Standard (New): | 0.06−0.16 mm (0.002−0.006 in.)
   Service Limit: | 0.20 mm (0.008 in.)