Oil Pump: Inspection: Inspection

INSPECT OIL PUMP RELIEF VALVE

Fig 1: Inspecting Oil Pump Relief Valve
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Coat the oil pump relief valve with engine oil, then check that it falls smoothly into the valve hole by its own weight.
  If the valve does not fall smoothly, replace the oil pump relief valve. If necessary, replace the timing chain cover sub-assembly.
INSPECT OIL PUMP ROTOR SET

Fig 2: Identifying Matchmarks On Oil Pump Rotor Set
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Place the drive and driven rotors into the timing chain cover sub-assembly with the matchmarks facing upward.
  TEXT IN ILLUSTRATION
  
  *a Matchmark
2. Check the rotor tip clearance.
  1. Using a feeler gauge, measure the clearance between the drive and driven rotor tips.
    
    Fig 3: Measuring Clearance Between Drive & Driven Rotor Tips Using Feeler Gauge
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard tip clearance
    
    0.06 to 0.16 mm (0.00236 to 0.00630 in.)
    
    Maximum tip clearance
    
    0.16 mm (0.00630 in.)
    
    If the clearance is more than the maximum, replace the timing chain cover sub-assembly.
3. Check the rotor side clearance.
  1. Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge.
    
    Fig 4: Measuring Clearance Between Rotors & Precision Straightedge Using Feeler Gauge & Precision Straightedge
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard side clearance
    
    0.030 to 0.075 mm (0.00118 to 0.00295 in.)
    
    Maximum side clearance
    
    0.075 mm (0.00295 in.)
    
    If the clearance is more than the maximum, replace the timing chain cover sub-assembly.
4. Check the rotor body clearance.
  1. Using a feeler gauge, measure the clearance between the driven rotor and body.
    
    Fig 5: Measuring Clearance Between Driven Rotor & Body Using Feeler Gauge
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard body clearance
    
    0.250 to 0.325 mm (0.00984 to 0.0128 in.)
    
    Maximum body clearance
    
    0.325 mm (0.0128 in.)
    
    If the clearance is more than the maximum, replace the timing chain cover sub-assembly.