Inspection After Disassembly

Clearance of Oil Pump Parts 

• Measure clearance with feeler gauge (A).

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• Clearance between outer rotor and oil pump body (position 1).

  Standard

  : Oil Pump

• Tip clearance between inner rotor and outer rotor (position 2).

  Standard

  : Oil Pump

• Measure clearance with feeler gauge and straightedge (A).

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• Side clearance between inner rotor and oil pump body (position 3).

  Standard

  : Oil Pump

• Side clearance between outer rotor and oil pump body (position 4).

• Calculate the clearance between inner rotor (1) and oil pump body as follows:

1. Measure the outer diameter of protruded portion of inner rotor (position A).

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2. Measure the inner diameter of oil pump body with inside micrometer (position B).

   (clearance 5) = (inner diameter of oil pump body B) - (outer diameter of inner rotor A)

   Standard

   : Oil Pump

3. If out of specifications, replace oil pump assembly.

Regulator Valve 

1. Visually inspect components for wear and damage.

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2. Check oil pressure regulator valve sliding surface (A) and valve spring (B).
3. Coat regulator valve with engine oil. Check that it falls smoothly into the valve hole by its own weight.

   If damaged, replace oil pump assembly. 

Regulator Valve Clearance 

(Clearance 6) = D (Valve hole diameter) - E (Outer diameter of valve)

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If it exceeds the standard, replace the oil pump assembly.