TSB : Oil Pump: Inspection: Inspection

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WARNING: This page is about a different variant/trim than selected. INSPECT OIL PUMP RELIEF VALVE Coat the oil pump relief valve with engine oil, then check that it falls smoothly into the valve hole by its own weight. Fig 1: Locating Relief Valve Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 If this does not occur, replace the oil pump. INSPECT OIL PUMP ROTOR Using a feeler gauge, measure the clearance between the drive and driven rotor tips. Fig 2: Measuring Clearance Between Drive And Driven Rotor Tips Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Standard tip clearance 0.08 to 0.16 mm (0.00315 to 0.00630 in.) Maximum tip clearance 0.35 mm (0.0138 in.) If the tip clearance is greater than the maximum, replace the oil pump. Using a feeler gauge and precision straightedge, measure the clearance between the 2 rotors and precision straight edge. Fig 3: Measuring Clearance Between Rotors And Precision Straightedge Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Standard side clearance 0.03 to 0.08 mm (0.00118 to 0.00315 in.) Maximum side clearance 0.16 mm (0.00630 in.) If the side clearance is greater than the maximum, replace the oil pump. Using a feeler gauge, measure the clearance between the driven rotor and oil pump body. Fig 4: Measuring Clearance Between Driven Rotor And Oil Pump Body Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Standard body clearance 0.12 to 0.19 mm (0.00472 to 0.00748 in.) Maximum body clearance 0.325 mm (0.0128 in.) If the body clearance is greater than the maximum, replace the oil pump.