Removal procedure
1. Remove the engine cover screw.
2. Remove the timing belt. follow the paragraph «The drive belt of the gas distribution mechanism» in this section.
3. Disconnect the breather hose and the positive crankcase ventilation hose from the cylinder head cover.
4. Disconnect the ignition wires from the spark plugs.
5. Remove cylinder head cover. See «cylinder head cover» in this section.
Note: Be especially careful not to scratch, dent or damage the camshafts.
6. While firmly holding the intake camshaft, remove the intake camshaft gear screw.
7. Remove the intake camshaft gear.
8. While firmly holding the exhaust camshaft, remove the exhaust camshaft gear screw.
9. Remove the exhaust camshaft gear.
10. Loosen the camshaft bearing cap screws by a half turn or a turn.
11. Remove the camshaft bearing cap screws from the cylinder head.
12. Remove camshafts.
13. Remove the O-ring from the camshafts.
Important: The camshaft must be evenly removed from the bearing seats in the front guide.
14. Check the camshaft and bearing seats for wear and replace if necessary.
Installation procedure
Note: Be especially careful not to scratch, dent or damage the camshafts.
1. Lubricate the camshaft journals and heads with engine oil.
2. Install the intake and exhaust camshafts.
3. Install the intake and exhaust camshaft bearing caps to their original positions.
4. Install the intake and exhaust camshaft bearing cap bolts.
5. Tighten the camshaft bearing cap bolts gradually in the sequence shown for each camshaft cap.
Tighten
Tighten the camshaft bearing cap bolts to 8 Nm (71 lb-in.).
6. Measure the end play of the intake and exhaust camshafts. See «Engine Specifications» in this section.
7. Install the intake camshaft gear.
8. While firmly holding the intake camshaft, install a new intake camshaft gear bolt.
Tighten
Tighten the intake camshaft gear bolt to 50 Nm (37 lb-ft) plus 60°and 15°using the angle torque indicator KM-470-B.
9. Install the exhaust camshaft gear.
10. While firmly holding the exhaust camshaft, install a new exhaust camshaft gear bolt.
Tighten
Tighten the exhaust camshaft gear bolt to 50 Nm (37 lb-ft) plus 60°and 15°using the angle torque indicator KM-470-B.
11. Install the timing belt. follow the paragraph «The drive belt of the gas distribution mechanism» in this section.
12. Install the cylinder head cover gasket and cylinder head cover.
Tighten
Tighten cylinder head cover bolts to 8 Nm (71 lb-in.).
13. Connect the ignition wires to the spark plugs.
14. Connect the breather and positive crankcase ventilation hose to the cylinder head cover.
15. Install the decorative engine cover.
Tighten
Tighten the bolts and nuts of the decorative engine cover to a torque of 8 Nm (71 lb-in.).
