Exhaust Camshaft

CAUTION: Since the thrust clearance of the camshaft is small, the camshaft must be kept level while it is being removed. 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. Bring the service bolt hole of the driven sub-gear upward by turning the hexagon wrench head portion of the exhaust camshaft with a wrench.
2. Secure the exhaust camshaft sub-gear to the main gear with a service bolt.
Recommended service bolt:
Thread diameter: 6 mm
Thread pitch: 1.0 mm
Bolt length: 16 - 20 mm (0.63 - 0.79 inch)

NOTE: When removing the camshaft, make sure that the torsional spring force of the sub-gear has been eliminated by the above operation.

3. Set the timing mark (two dot marks) of the camshaft driven gear at approximately 35° angle by turning the hexagon wrench head portion of the intake camshaft with a wrench.
4. Lightly push the camshaft towards the rear without applying excessive force.

5. Loosen and remove the No. 1 bearing cap bolts, alternately loosening the left and right bolts uniformly.

6. Loosen and remove the No. 2, No. 3, No. 5 and No. 7 bearing cap bolts, alternately loosening the left and right bolts uniformly in several passes, in the sequence shown.

CAUTION: Do not remove the No. 4 and No. 6 bearing cap bolts at this stage.

7. Remove the 4 bearing caps.

8. Alternately and uniformly loosen and remove the No. 4 and No. 6 bearing cap bolts.

NOTE:
- As the 4 No. 4 and No. 6 bearing cap bolts are loosened, make sure that the camshaft is lifted out straight and level.
- If the camshaft is not being lifted out straight and level, retighten the 4 No. 4 and No. 6 bearing cap bolts. Then reverse the order of above steps from (g) to (e) and repeat steps from (c) to (h) once again.

CAUTION: Do not pry on or attempt to force the camshaft with a tool or other object.

9. Remove the 2 bearing caps and exhaust camshaft.