Clamp the cylinder head in a vice together with the bracket screwed to the exhaust port studs.
First remove the intake camshaft. To do this, slowly and alternately on each side, disconnect the bearing caps #5 and #7 and the last bearing cap; take them off.
Loosen the nuts of bearing caps #6 and #8 evenly and crosswise by two turns until both caps are disconnected. Remove the caps and lift the camshaft, while simultaneously disengaging it from the drive chain.
Mark the direction of the water chain with paint. If this is not done and the chain is installed incorrectly during installation, it will wear out very quickly and will soon have to be replaced again.
Unscrew and remove bearing caps No.1 and No.3, front and rear.
Loosen bearing caps #2 and #4 evenly and crosswise. Remove the caps and take out the camshaft.
The oil seal ring is located in the front bearing cover of this shaft.
Remove the tappets. They must not be mixed up, so mark them accordingly. It is best to mark them by drawing marks on the inside, i.e. one mark on the first tappet, two marks on the second, etc. Work from the engine control system side; always note whether the tappet is on the inlet or outlet section. Do not lay the tappets on their sides, but install them so that the contact surface faces inward.
The tool required for dismantling and installing the valves according to the instructions is part number 2036. The tool is brought to the cylinder head. If you have the necessary tool, you should look at the pictures, since dismantling the intake and exhaust valves is carried out differently. When dismantling the intake valves, the lever is pulled up to press the plunger; when removing the exhaust valves, press the lever down to push the plunger in. The plunger size of the tool is matched to the inside of the valve spring seats, otherwise the springs cannot be compressed. Compress the springs until the valve half cones can be removed.
To dismantle the valves, you can also use a piece of pipe, which is put on the upper spring plate for this purpose. Place something suitable under the spring plate located on the other side. Use a hammer to strike the pipe briefly so that the valve half-cones can pop out. They remain inside the pipe. To prevent them from getting lost, the pipe must adhere well to the spring plate.
Remove the retainers and springs. Remove the valve stem seals and discard them immediately as they will need to be replaced. Remove the lower spring retainer from the hole using the 3047 special tool or a collet with an internal elastic snap ring.
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