Removing
1. Set the piston of the first cylinder to the TDC position, refer to Section Setting the piston of the first cylinder to the TDC position.
2. Remove the engine top cover, refer to the relevant section.
3. Remove the chain tensioner, refer to the appropriate section.
4. Remove the front cover, refer to the relevant section.
5. Lock the intake camshaft. To do this, insert the locking pin through the cover of the first camshaft bearing into the hole in the camshaft sprocket.
6. Disconnect the intake camshaft driver. At the same time, hold the shaft from turning with a wrench.
7. Remove the top rail.
Installation
1. Install the top rail.
2. Fix the driver on the intake camshaft with a torque of 50Nm. At the same time, hold the shaft from turning with a wrench.
3. Remove the locking pin from the hole in the camshaft bearing cap and intake sprocket.
4. Install the front cover, refer to the relevant section.
5. Install the chain tensioner with a new gasket, refer to the appropriate section.
6. Install engine top covers, refer to appropriate section.