Radial clearance

Check radial clearance between outer rotor (1) and oil pump housing (2) using thickness gauge.

If clearance is out of specification, replace oil pimp assembly.

Oil pump radial clearance 

Standard: 0.150 - 0.210 mm (0.0059 - 0.0082 in.) 

Fig 1: Checking Radial Clearance Between Outer Rotor And Oil Pump Housing

Courtesy of SUZUKI OF AMERICA CORP.