16 ENGINE 131
300230-10
– Press in the large camshaft bearing as far as possible using the special tool 4.
Push-in drift (75029044010) ( p. 216)
Finishing work
– Install the rocker arm. ( p. 134)
16.4.22 Removing valves
300115-10
– Take shims 1 out of the valve spring retainers and lay them to one side according
to their normal built-in position.
300116-10
– Pretension the valve springs using the special tool.
Valve spring compressor (59029019000) ( p. 212)
Valve spring mounting device (78029060000) ( p. 219)
– Remove valve keys and release tension on the valve springs.
– Remove spring retainers and spring.
– Pull the valve down and out of the valve guide, remove the valve stem seal and
valve spring retainer.
300117-10
– Mark the valves according to their normal built-in position.
Info
Place the valves into a box according to the installation position and label
the box.
16.4.23 Checking valves
200193-10
– Check the run-out at the valve plate.
Valve - run-out
On the valve plate ≤ 0.05 mm (≤ 0.002 in)
» If the measured value does not equal the specified value:
– Change the valve.
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