Cylinder Head Installed

NOTE: Step numbers below refer to numbers used in the illustrations.

1. Disconnect the electric leads and remove the ignition discharge module or cover plate and ignition cables.
- Undo the bolt for the crankcase breather pipe on the camshaft cover and remove the nipple for crankcase ventilation and vacuum from the camshaft cover.
- Remove the camshaft cover.
2. Turn the crankshaft to the 0° mark, remove the chain tensioner and camshafts.
- Cover the space for the sprockets and timing chain to prevent collets and seals from falling inside.

NOTE: Place all valve parts in order in valve stand tool No. 83 93 787, or equivalent.

3. Lift out the tappets, using magnetic tool No. 83 91 401, or equivalent.
4. Install plastic sleeves tool No. 83 93 746, or equivalent, over the valve springs to prevent scoring and scratching of the tappet bores.
- Refer to the illustration to position the sleeves.
5. Turn the crankshaft to bring the piston in the cylinder concerned up to the top dead centre position.
- Use flywheel locking segment tool No. 83 94 868, or equivalent, to prevent the crankshaft from turning.
- Remove the spark plug from the cylinder in question and install air nipple tool No. 83 94 173, or equivalent, in the spark plug hole.
- Connect a suitable compressed air supply and pressurize the piston and valves.
6. Hold removal tool No. 83 94 181, or equivalent, against the valve head and in line with the valve stem.
- Strike the tool smartly with a hammer.
- This should free the collets from the valve and they will then be collected in the tool when it is removed.
7. Lift out the spring cap and valve spring.
- Remove the valve guide seal using special pliers tool No. 83 94 157, or equivalent.