Oil Pump: Inspection

1. INSPECT OIL JET 

   Check the oil jet for damage or clogging.

   If necessary, replace the oil pump assembly.

   Fig 1: Inspecting Oil Pump Oil Jet

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. INSPECT RELIEF VALVE 

   Coat the valve with engine oil and check that it falls smoothly into the valve hole by its own weight.

   If it does not, replace the relief valve. If necessary, replace the oil pump assembly.

   Fig 2: Inspecting Relief Valve

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. INSPECT ROTOR SIDE CLEARANCE 

   Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.

   1. Standard side clearance: 
      1. 0.025 - 0.071 mm (0.0010 - 0.0028 in.) 
   2. Maximum side clearance: 
      1. 0.071 mm (0.0028 in.) 

   If the side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.

   Fig 3: Checking Oil Pump Rotor Side Clearance

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. INSPECT ROTOR TIP CLEARANCE 

   Using a feeler gauge, measure the clearance between the drive and driven rotor tips.

   1. Standard tip clearance: 
      1. 0.040 - 0.160 mm (0.0016 - 0.0063 in.) 
   2. Maximum tip clearance: 
      1. 0.160 mm (0.0063 in.) 

   If the tip clearance is greater than maximum, replace the rotors as a set.

   Fig 4: Checking Oil Pump Rotor Tip Clearance

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. INSPECT ROTOR BODY CLEARANCE 

Using a feeler gauge, measure the clearance between the driven rotor and body.

Fig 5: Checking Oil Pump Rotor body Clearance

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Standard body clearance: 
   1. 0.260 - 0.325 mm (0.0102 - 0.0130 in.) 
2. Maximum body clearance: 
   1. 0.325 mm (0.0130 in.) 

If the body clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.