Oil Pump Inspection

Reference: OIL PUMP AND OIL PUMP CHAIN REMOVAL AND INSTALLATION 

Reference: OIL PUMP DISASSEMBLY AND REASSEMBLY 

• Check outer rotor, inner rotor and oil pump cases for excessive wear or damage.
• Check relief valve for excessive wear or damage.
• Measure free length and tension of oil relief spring.

  Spring (for oil pump) free length 

  63.47 mm (2.49 in.) 

  Spring (for oil pump) preload 

  80.38 - 88.22 N (8.04 - 8.82 kg, 58.14 - 63.80 lb) for 52.0 mm (2.05 in.) 

  Fig 1: Measuring Free Length & Tension Of Oil Relief Spring

  Courtesy of SUZUKI OF AMERICA CORP.

• Radial clearance 

  Measure clearance of oil pump rotor and oil pump case using thickness gauge.

  Check radial clearance between outer rotor (2) and case (1), using thickness gauge (3).

  If clearance exceeds its limit, replace oil pump assembly.

  Radial clearance between oil pump outer rotor and oil pump case 

  Limit: 0.19 mm (0.0075 in.) 

  Fig 2: Checking Radial Clearance Between Outer Rotor & Case

  Courtesy of SUZUKI OF AMERICA CORP.
• Side clearance 

  Using straightedge (5) and thickness gauge (4), measure side clearance. If clearance exceeds its limit, replace oil pump assembly.

  Oil pump side clearance 

  Limit: 0.11 mm (0.0043 in.) 

  Fig 3: Measuring Oil Pump Side Clearance

  Courtesy of SUZUKI OF AMERICA CORP.