1. Remove the camshaft gear as described in Section Removal, inspection and installation of the gear wheel of the drive belt and the tension mechanism.
2. Note the correct location of the old oil seal. Using a small screwdriver, remove the oil seal from the cylinder head.
3. Wipe a basic surface in a head of the block of cylinders.
4a. Apply a small amount of oil to the outer edge and sealing lip of the new oil seal. Insert the seal into the head of the block.
4b. Hammer it into place with a metal tube or socket, the outer diameter of which is slightly smaller than the diameter of the oil seal seat in the cylinder head (refer to illustrations). Make sure the oil seal is correctly oriented with the sealing lip facing in.
5. Install the camshaft gear as described in Section Removal, inspection and installation of the gear wheel of the drive belt and the tension mechanism.