Removing
1. Remove the front timing belt cover (Chapter 3), timing belt (Chapter 5) and camshaft sprocket (Chapter 6).
2. Remove the camshaft cover (Chapter 2).
3. Remove the injection air tubes (Section 6).
4. Remove the distributor (Section 5) and the rear cover of the gearbox (Chapter 10).
5. Unscrew the bolts of the front casing, carefully disconnect the casing from the engine and remove it (photo).
A screwdriver wrapped in rags can be used to pry the cover out without damaging the aluminum casing
6. Remove the rocker arms and shaft assembly from the engine (Chapter 11).
7. Remove the fuel pump and disconnect the camshaft from the engine.
Installation
8. Lubricate the journals and place the camshaft in position with the knock pin on top.
The camshaft knock pin must be up when the camshaft is installed
9. Install rocker arms and shaft assembly.
10. Install the front cover using a new gasket.
11. Install the camshaft sprocket, making sure the marks on the sprocket and front casing are aligned.
12. Install the back cover (using a new gasket) and distributor.
13. Install the fuel pump, air injection pipes, camshaft cover, timing belt and cover.
14. If the installed camshaft is replaced with a new one, follow any break-in instructions given by the manufacturer.