Camshaft: Service and Repair

Removal Procedure
1. Remove the timing belt.
2. Disconnect the breather tube at the valve cover.
3. Disconnect the crankcase ventilation tube at the valve cover.
4. Remove the spark plug cover bolts.
5. Remove the spark plug cover.
6. Disconnect the ignition wires from the spark plugs.
7. Disconnect the camshaft position sensor.





8. Remove the valve cover bolts.
9. Remove the valve cover washers.
10. Remove the valve cover and the valve cover gasket.

Notice: Take extreme care to prevent any scratches, nicks or damage to the camshafts.





11. While holding the intake camshaft firmly in place, remove the intake camshaft gear bolt.
12. Remove the intake camshaft gear.
13. While holding the exhaust camshaft firmly in place, remove the exhaust camshaft gear bolt.
14. Remove the exhaust camshaft gear.





15. Loosen the camshaft bearing cap bolts in stages of one-half to one turn.
16. Remove the camshaft bearing cap bolts from the cylinder head.
17. Remove the camshafts.
18. Remove the seal ring from the camshafts.

Important: The camshaft must detach evenly from the bearing seats in the front guide bearing.

19. Check the camshaft and bearing seats for wear and replace them if necessary.

Installation Procedure

Notice: Take extreme care to prevent any scratches, nicks or damage to the camshafts.





1. Lubricate the camshaft journals and the camshaft caps with engine oil.
2. Install the intake camshaft.
3. Install the intake camshaft caps in their original positions.
4. Install the intake camshaft cap bolts.
5. Install the exhaust camshaft.
6. Install the exhaust camshaft caps in their original positions.
7. Install the exhaust camshaft cap bolts.






8. Tighten the camshaft cap bolts gradually and in the sequence shown for each camshaft cap.
Tighten the camshaft cap bolts to 8 Nm (71 inch lbs.).





9. Measure the intake camshaft end play and the exhaust camshaft end play. Refer to Camshaft, Engine; Specifications.
10. Install the intake camshaft gear.
11. While holding the intake camshaft firmly in place, install the intake camshaft gear bolt.
Tighten the intake camshaft gear bolt to 50 Nm (37 ft. lbs.). Using the angular torque gauge KM-470-B, tighten the bolt another 60 degrees plus 15 degrees.
12. Install the exhaust camshaft gear.





13. While holding the exhaust camshaft firmly in place, install the exhaust camshaft gear bolt.
Tighten the exhaust camshaft gear bolt to 50 Nm (37 ft. lbs.). Using the angular torque gauge KM-470-B, tighten the bolt another 60 degrees plus 15 degrees.
14. Install the valve cover and the valve cover gasket.
15. Install the valve cover washers.





16. Install the valve cover bolts.
Tighten the valve cover bolts to 8 Nm (71 inch lbs.).
17. Connect the camshaft position sensor.
18. Connect the ignition wires to the spark plugs.
19. Install the spark plug cover.





20. Install the spark plug cover bolts.
Tighten the spark plug cover bolts to 3 Nm (27 inch lbs.).
21. Connect the breather tube to the valve cover.
22. Connect the crankcase ventilation tube to the valve cover.
23. Install the timing belt.