Intake 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. Set the timing mark (two dot marks) of the camshaft drive gear at approximately 25° angle by turning the hexagon wrench head portion of the intake camshaft with a wrench.

NOTE: The above angle arrows the No. 1 and No. 4 cylinder cam lobes of the intake camshaft to push their valve lifters evenly.

2. Lightly push the intake camshaft towards the front without applying excessive force.





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





4. Loosen and remove the No. 3, No. 4, No. 6 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. 2 and No. 5 bearing cap bolts at this stage.

5. Remove the 4 bearing caps.





6. Alternately and uniformly loosen and remove the No. 2 and No. 5 bearing cap bolts.

NOTE:
- As the 4 No. 2 and No. 5 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. 2 and No. 5 bearing cap bolts. Then reverse the order of above steps from (e) to (c) and repeat steps from (a) to (f) once again.

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

7. Remove the 2 bearing caps and exhaust camshaft.