Repair Procedures: Inspection: Camshaft

Using a micrometer, measure the cam lobe height.

Cam Height 

Intake:  39.5 mm (1.5551 in.)

Exhaust:  37.6 mm (1.4803 in.)

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Inspect the cam lobe surface for abnormal wear and damage. Replace if necessary.

1. Clean the bearing caps and camshaft journals.
2. Place the camshafts on the cam carrier.
3. Lay a strip of plastic gauge across each of the camshaft journal.

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4. Install the camshaft bearing caps (A) and tighten the bolts to the specified torque.

   Tightening torque: 

   Step 1 

   M6: 4.9 - 7.8 N.m (0.5 - 0.8 kgf.m, 3.6 - 5.7 lb-ft)

   M8: 9.8 - 11.7 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.6 lb-ft)

   Step 2 

   M6: 11.7 - 13.7 N.m (1.2 - 1.4 kgf.m, 8.6 - 10.1 lb-ft)

   M8: 18.6 - 22.5 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb-ft)

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   NOTE:

   • When installing the camshaft front bearing cap and camshaft bearing caps, tighten the bolts and nuts with pre-torque first, and then tighten the bolts and nuts with specified torque in the sequence shown.

   Fig 1: Camshaft Front Bearing Cap And Camshaft Bearing Caps Bolts Tightening Sequence

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   NOTE:

   • Do not turn the camshaft.
5. Remove the camshaft bearing caps (A).

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   NOTE:

   • Be careful not to change the position and direction of the camshaft bearing caps.
   NOTE:

   • Remove the camshaft bearing caps in the sequence shown below.

   Fig 2: Camshaft Bearing Caps Bolts Loosening Sequence

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6. Measure the plastic gauge at its widest point.

   Tightening torque: 

   [Specified value] 

   No. 1 journal: 0.037 - 0.065 mm (0.00114 - 0.00224 in.)

   No. 2, 3, 4, 5 journal: 0.037 - 0.067 mm (0.00145 - 0.00263 in.)

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   If the oil clearance is greater than maximum value, replace the camshaft. If necessary, replace cylinder head.

7. Completely remove the plastic gauge.
8. Remove the camshaft.

1. Install the camshaft.
2. Using a dial gauge, measure the end play while moving the camshaft back and forth.

   Camshaft end play: 

   [Standard value]:  0.09 - 0.23 mm (0.0035 - 0.0090 in.)

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If the end play is greater than maximum value, replace the camshaft. If necessary, replace cylinder head.