Intake Camshaft

CAUTION: Since the thrust clearance of the camshaft is small, the camshaft must be kept level while it is being installed. If the camshaft is not kept level, the portion of the cylinder head receiving the shaft thrust may crack or be damaged, causing the camshaft to seize or break. To avoid this, the following steps should be carried out.





1. Set the timing mark (two dot marks) of the camshaft drive gear at approximately 35° angle by turning the hexagon wrench head portion of the intake camshaft with a wrench.
2. Apply engine oil to thrust portion of the exhaust camshaft.





3. Engage the exhaust camshaft gear to the intake camshaft gear by matching the timing marks (two dot marks) on each gear.
4. Roll down the exhaust camshaft onto the bearing journals while engaging gears with each other.
5. Lightly push the intake camshaft towards the front without applying excessive force.





6. Install the No. 4 and No. 6 bearing caps in their proper location.
7. Temporarily tighten the bearing cap bolts uniformly and alternately in several passes until the bearing caps are snug with the cylinder head.





8. Place the No. 2, No. 3, No. 5 and No. 7 bearing caps in their proper location.
9. Temporarily tighten these bearing cap bolts, alternately tightening the left and right bolts uniformly.





10. Place the No. 1 bearing cap in its proper location. When doing this, check that there is no gap between the cylinder head and the contact surface of bearing cap.
11. Temporarily tighten the bearing cap bolts, alternately tightening the left and right bolts uniformly.
12. Uniformly tighten the 14 bearing cap bolts in several passes.
Torque: 16 Nm (12 ft. lbs.)





13. Bring the service bolt installed in the driven sub-gear upward by turning the hexagon wrench head portion of the camshaft with a wrench.
14. Remove the service bolt.
15. Check that the intake and exhaust camshafts turn smoothly.