Oil Pump: Inspection

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT OIL PUMP RELIEF VALVE
1. Coat the relief valve with engine oil and drop it into the relief valve hole.
2. Check that the relief valve falls in smoothly by its own weight.
  If it does not, replace the relief valve. If necessary, replace the timing chain cover.
  
  Fig 1: Coating Relief Valve With Engine Oil & Drop Into Relief Valve Hole
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT OIL PUMP ROTOR SET
1. Install the drive and driven rotors into the timing chain cover with the rotors' marks facing the cylinder block side. Check that the rotors revolve smoothly.
  
  Fig 2: Installing Drive & Driven Rotors Into Timing Chain Cover With Rotors Marks Facing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the tip clearance.
  1. Using a feeler gauge, measure the clearance between the drive rotor and driven rotor tips.
    Standard tip clearance: 0.060 to 0.160 mm (0.0024 to 0.0063 in.)
    
    Maximum tip clearance: 0.16 mm (0.0063 in.)
    
    If the tip clearance is greater than the maximum, replace the timing chain cover.
    
    Fig 3: Measuring Clearance Between Drive Rotor & Driven Rotor Tips
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the body clearance.
  1. Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor.
    Standard body clearance: 0.250 to 0.325 mm (0.0098 to 0.0128 in.)
    
    Maximum body clearance: 0.325 mm (0.0128 in.)
    
    If the body clearance is greater than the maximum, replace the timing chain cover.
    
    Fig 4: Measuring Clearance Between Timing Chain Cover & Driven Rotor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the side clearance.
  1. Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge.
    Standard side clearance: 0.030 to 0.090 mm (0.0012 to 0.0035 in.)
    
    Maximum side clearance: 0.090 mm (0.0035 in.)
    
    If the side clearance is greater than the maximum, replace the timing chain cover.
    
    Fig 5: Measuring Clearance Between Rotors & Precision Straightedge
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002