Oil seal on the drive belt side
1. Remove the camshaft timing gear as described in Section Removal and installation of drive belt gears and tensioner mechanism.
2. Remove the woodruff key (where is available) from the end of the camshaft.
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3a. Mark the installation depth of the old oil seal, then use a screwdriver to remove it from the cylinder head without damaging the camshaft. The oil seal can be removed in another way. Drill a small hole in it, screw in a self-tapping screw.
3b. Use pliers to remove the seal (refer to the illustrations). If this fails, screw in a second screw.
4. Wipe the seal contact surface on the cylinder head, then dip the new seal in oil and install it on the camshaft with the closed side facing out.
5. Using a pipe of suitable diameter, drive the seal into the casing to the previously marked depth.
6. Install the camshaft timing gear as described in Section Removal and installation of drive belt gears and tensioner mechanism.
Flywheel side oil seal
1. There is no oil seal on the flywheel end of the camshaft. Sealing is provided by a gasket between the cylinder head and the vacuum pump housing and, on some models, by an O-ring installed between the pump and the housing. The gasket or O-ring can be replaced by removing the pump from the engine (refer to Chapter Brake system).