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.

NOTE: If any repair is required on outer rotor, inner rotor and oil pump cases, replace them as an assembly.

Measure free length and tension of oil relief spring.
Spring (for oil pump): free length 63.5 mm (2.5 in.)

Spring (for oil pump): preload 86 N for 52 mm (8.6 kg for 52 mm, 62.2 lb for 2.05 in.)

Fig 1: Measuring Relief Valve Spring Length
Courtesy of SUZUKI OF AMERICA CORP.
Measure clearance of oil pump rotor and oil pump case.