Oil Pump: Inspection

INSPECT OIL PUMP RELIEF VALVE
1. Coat the relief valve with engine oil.
2. Check that the relief valve falls smoothly into the valve hole by its own weight.
  If the relief valve does not fall smoothly, replace it. If necessary, replace the timing chain cover sub-assembly.
  
  Fig 1: Checking Relief Valve Falls Smoothly Into Valve Hole
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT OIL PUMP ROTOR SET
1. Install the rotors to the timing chain cover with the marks of the rotors facing outward. Check that the rotors revolve smoothly.
  
  Fig 2: Identifying Oil Pump Rotor Matchmark Location
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the tip clearance.
  1. Using a feeler gauge, measure the clearance between the drive and driven rotor tips, as shown in the illustration.
    Standard tip clearance:
    
    0.180 to 0.300 mm (0.00709 to 0.0118 in.)
    
    Maximum tip clearance:
    
    0.300 mm (0.0118 in.)
    
    If the tip clearance is more than the maximum, replace the drive and driven rotors together.
    
    Fig 3: Measuring Clearance Between Drive And Driven Rotor Tips
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the side clearance.
  1. Using a feeler gauge and steel square, measure the clearance between the rotors and steel square as shown in the illustration.
    Standard side clearance:
    
    0.030 to 0.090 mm (0.00118 to 0.00354 in.)
    
    Maximum side clearance:
    
    0.090 mm (0.00354 in.)
    
    If the side clearance is more than the maximum, replace the timing chain cover sub-assembly.
    
    Fig 4: Measuring Clearance Between Rotors And Steel Square
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the body clearance.
  1. Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor as shown in the illustration.
    Standard body clearance:
    
    0.175 to 0.250 mm (0.00689 to 0.00984 in.)
    
    Maximum body clearance:
    
    0.250 mm (0.00984 in.)
    
    If the body clearance is more than the maximum, replace the timing chain cover sub-assembly.
    
    Fig 5: Measuring Clearance Between Timing Chain Cover And Driven Rotor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002