Engine Lubrication System: Inspection

Check Engine Oil Quality

Fig 1: Temperature Range & Recommended Viscosity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the oil for deterioration, entry of water, discoloring or thinning.

If the quality is visibly poor, replace the oil.

Oil grade:

API grade SL Energy-Conserving or ILSAC multigrade engine oil.
Check Engine Oil Level
After warming up the engine and then 5 minutes after the engine stop, oil level should be between the "L" and "F" marks on the dipstick.

If low. check for leakage and add oil up to the "F" mark.

NOTE: Do not fill with engine oil above the "F" mark.
Remove Oil Pressure Switch, And Install Oil Pressure Gauge
1. Using SST, remove the oil pressure switch.
  SST 09816-30010
  
  Fig 2: Removing Oil Pressure Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Install the oil pressure gauge.
Warm Up Engine
Allow the engine to warm up to normal operating temperature.
Check Oil Pressure
Oil pressure:

At idle speed

1ZZ-FE 29 kPa (0.3 kgf/cm ² , 4.3 psi) or more

2ZZ-GE 39.2 kPa (0.4 kgf/cm ² , 5.7 psi) or more At 3,000 rpm

294 - 539 kPa (3.0 - 5.5 kgf/cm ² , 43 - 78 psi)
Remove Oil Pressure Gauge And Reinstall Oil Pressure Switch
1. Remove the oil pressure gauge.
2. Apply adhesive to 2 or 3 threads of the oil pressure switch.
  
  Fig 4: Applying Adhesive To Oil Pressure Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Adhesive:
  
  Part No. 08833-00080, THREE BOND 1344,
  
  LOCTITE 242 or equivalent
3. Using SST, install the oil pressure switch. SST 09816-30010
  Torque: 13 N.m (130 kgf.cm, 9 ft.lbf)
Start Engine And Check For Leaks

Inspect Oil Jet

Fig 1: Inspecting Oil Jet
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the oil jet for damage or clogging.

If necessary, replace the oil pump assembly.
Inspect Relief Valve

Fig 2: Inspecting Relief Valve
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.
Inspect Rotor Side Clearance
Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.

Fig 3: Inspecting Rotor Side Clearance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard side clearance:

1ZZ-FE 0.025 - 0.071 mm (0.00098 - 0.00280 in.)

2ZZ-GE 0.030 - 0.080 mm (0.00118 - 0.00314 in.)

Maximum side clearance:

1ZZ-FE 0.071 mm (0.00280 in.)

2ZZ-GE 0.160 mm (0.00630 in.)

If the side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the oil pump assembly.
Inspect Rotor Body Clearance
Using a feeler gauge, measure the clearance between the driven rotor and body.

Fig 4: Inspect Rotor Body Clearance Using A Feeler Gauge
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard body clearance:

1ZZ-FE 0.260 - 0.325 mm (0.01024 - 0.01280 in.)

2ZZ-GE 0.125 - 0.180 mm (0.00492 - 0.00709 in.)

Maximum body clearance:

0.325 mm (0.01280 in.)

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

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

Fig 5: Inspecting Rotor Tip Clearance

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard tip clearance:

1ZZ-FE 0.040 - 0.160 mm (0.00157 - 0.00630 in.)

2ZZ-GE 0.060 - 0.180 mm (0.00236 - 0.00709 in.)

Maximum tip clearance:

1ZZ-FE 0.16 mm (0.00630 in.)

2ZZ-GE 0.35 mm (0.01378 in.)

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

Inspect Relief Valve (Oil Nozzle)

Push the valve with a wooden stick to check if it is stuck. If stuck, replace the relief valve.

Fig 1: Inspecting Relief Valve (Oil Nozzle)