Oil Pump Inspection: Notes

• 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. See Fig 1 .

  Spring (for oil pump) free length

  63.5 mm (2.5 in.) 

Spring (for oil pump) preload

86.0 N for 52.0 mm (8.6 kg for 52.0 mm, 62.2 lb for 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: 0.15 mm (0.0059 in.) 

  Fig 2: Checking Radial Clearance Between Outer Rotor & Case Using Thickness Gauge

  Courtesy of SUZUKI OF AMERICA CORP.