Inspection After Removal

Camshaft Runout 

1. Put the camshaft on a V-block supporting the No. 2 and No. 5 journals.

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   CAUTION: Do not support the No. 1 journal (on the side of the camshaft sprocket) because it has different diameter from the other four locations.
2. Set suitable tool (A) vertically on the No. 3 journal.
3. Turn camshaft in one direction by hand, and measure the camshaft runout on the dial gauge total indicator reading.

   Standard

   : Refer to Service Data .

Camshaft Cam Height 

1. Measure the camshaft cam height using suitable tool (A).

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   Standard and Limit

   : Refer to Service Data .

2. If wear is beyond the limit, replace the camshaft.

Camshaft Journal Clearance 

Outer Diameter of Camshaft Journal 

• Measure the outer diameter of the camshaft journal using suitable tool (A).

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  Standard

  : Refer to Service Data .

Inner Diameter of Camshaft Bracket 

• Tighten the camshaft bracket bolts to the specified torque following the tightening pattern as shown.

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  Step 1 (bolts 1 - 26)	: 1.96 N.m (0.20 kg-m, 17 in-lb)
  Step 2 (bolts 11 - 26)	: 5.88 N.m (0.60 kg-m, 52 in-lb)
  Step 3 (bolts 1 - 10)	: 5.88 N.m (0.60 kg-m, 52 in-lb)
  Step 4 (bolts 11 - 26)	: 10.41 N.m (1.1 kg-m, 8 ft-lb)
  Step 5 (bolts 1 - 10)	: 10.41 N.m (1.1 kg-m, 8 ft-lb)

  (A)	: Exhaust side
  (B)	: Intake side

• Using suitable tool (A), measure inner diameter of camshaft bracket.

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  Standard No. 1

  : Refer to Service Data .

  (B)	: Measuring direction of inner diameter

Calculation of Camshaft Journal Clearance 

• (Journal clearance) = (inner diameter of camshaft bracket) - (outer diameter of camshaft journal)

  Standard

  : Refer to Service Data .

• When out of the specified range above, replace either or both the camshaft and the cylinder head assembly.
  NOTE: Inner diameter of the camshaft bracket is manufactured together with the cylinder head. If the camshaft bracket is out of specification, replace the whole cylinder head assembly.

Camshaft End Play 

1. Install suitable tool (A) in the thrust direction on the front end of the camshaft. Measure the end play with the dial gauge while moving the camshaft forward and backward (in direction to axis).

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   Standard

   : Refer to Service Data .

   • Measure the following parts if out of the standard.

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     • Dimension (A) for camshaft No. 1 journal

       Standard

       : Refer to Service Data .

     • Dimension (B) for cylinder head No. 1 journal

       Standard

       : Refer to Service Data .

   • Refer to the standards above, and then replace camshaft and/ or cylinder head.

Camshaft Sprocket Runout 

1. Install the camshaft in the cylinder head.
2. Install the camshaft sprocket on the camshaft.
3. Measure camshaft sprocket runout while turning the camshaft by hand using suitable tool (A).

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   Limit

   : Refer to Service Data .

4. If it exceeds the specification, replace camshaft sprocket.

Valve Lifter 

• Check if the surface of the valve lifter has any excessive wear or cracks, replace as necessary.

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Valve Lifter Clearance 

Outer Diameter of Valve Lifter 

• Measure the outer diameter of the valve lifter using suitable tool (A).

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  Standard

  : Refer to Service Data .

• If out of the specified range, replace the valve lifter.

Valve Lifter Bore Inner Diameter 

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• Measure diameter of valve lifter bore of cylinder head using suitable tool (A).

  Standard

  : Refer to Service Data .

• If out of the specified range, replace the cylinder head assembly.

Calculation of Valve Lifter Clearance 

• (Valve lifter clearance) = (hole diameter for valve lifter) - (outer diameter of valve lifter)

  Standard

  : Refer to Service Data .

• If out of specified range, replace either or both valve lifter and cylinder head assembly.