Inspection After Disassembly

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

Clearance of Oil Pump Parts

Measure radial clearance using a suitable tool.
Body to outer rotor (position 1) : 0.120 - 0.195 mm (0.0047 - 0.0077 in)

Inner rotor to outer rotor tip (position 2) : 0.060 - 0.160 mm (0.0024 - 0.0063 in)

Fig 1: Measuring Radial Clearance Of Inner Rotor To Outer Rotor Tip
Measure side clearance using suitable tools.
Body to inner rotor (position 3) : 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Body to outer rotor (position 4) : 0.050 - 0.090 mm (0.0020 - 0.0035 in)

Fig 2: Measuring Side Clearance Of Body To Inner Rotor/Outer Rotor
Calculate the clearance between inner rotor and oil pump body as follows.
1. Measure the inner diameter of oil pump body to brazed portion (position 5) using suitable tool.
2. Measure the outer diameter of protruded portion of inner rotor (position 6) using suitable tool.
  
  Fig 3: Measuring Inner Diameter Of Oil Pump Body To Brazed Portion
3. Calculate the clearance using the following formula.
  - (Clearance) = (Inner diameter of oil pump body) - (Outer diameter of inner rotor)
    Inner rotor to brazed portion of housing clearance : 0.045 - 0.091 mm (0.0018 - 0.0036 in)

Regulator Valve Clearance

Check regulator valve to oil pump cover clearance using the following formula.

(Clearance) = D₁ (Valve hole diameter) - D₂ (Outer Diameter of valve)
Regulator valve to oil pump cover : 0.025 - 0.070 mm (0.0010 - 0.0028 in)
CAUTION:
- Coat regulator valve with engine oil.
- Check that it falls smoothly into the regulator valve hole by its own weight.
  
  Fig 4: Checking Regulator Valve To Oil Pump Cover Clearance