Oil Pump: Inspection

Note position of oil pump gears. Clean all parts with solvent. Dry parts using compressed air. Ensure oil passages are clear. Check driven gear-to-body clearance. Push driven gear against one side of oil pump. Measure clearance between driven gear and oil pump body. See Figure. Replace oil pump body if clearance is not within specification. See OIL PUMP CLEARANCE SPECIFICATIONS table.
Measure tip clearance between driven gear and crescent-shaped part of oil pump body. See Figure. Replace oil pump body if clearance is not within specification. See OIL PUMP CLEARANCE SPECIFICATIONS table.
Using feeler gauge and straightedge, measure side clearance of both gears. See Figure. Replace oil pump body if clearance is not within specification. See OIL PUMP CLEARANCE SPECIFICATIONS table. Gears are available in 3 different thicknesses. See DRIVE & DRIVEN GEAR THICKNESS SPECIFICATIONS table.
Using a dial indicator, measure inside diameter of oil pump body bushing. Maximum inside diameter should be 1.503" (38.18 mm). If inside diameter exceeds specification, replace oil pump body.
Measure inside diameter of stator shaft bushings. Maximum front side bushing inside diameter should be .849" (21.57 mm). Maximum rear side bushing inside diameter should be 1.066" (27.07 mm). If inside diameter exceeds specification, replace stator shaft.

DRIVE & DRIVEN GEAR THICKNESS SPECIFICATIONS

OIL PUMP CLEARANCE SPECIFICATIONS