Mercedes-Benz 201.024 Service Manual page 205

Checking
1 Turn crankshaft until cam tips of No. 1
cylinder intake valve point downwards (valve
closed).
Caution!
The engine must not be turned at the camshaft
timing gear fixing bolt.
Under no circumstances turn engine backwards
during the measurement, otherwise considerable
measuring errors result, and chain tensioner lock
2 Remove rocker arm bearing support of No. 1
cylinder (05235).
3 Install intake valve rocker arm against the
rigid rocker arm @la) Part No. 102 055 00 01
together with the adjustment bolt (164) Part
No. 102 050 02 20 and the locknut (163) Part
No. 000936 008009 (05-240).
Install rocker arm bearing support, 21 Nm.
4
Install the dial gauge bracket with threaded
5
sleeve onto the stud on the front left part of the
cylinder head.
Insert dial gauge and attach so that tip is
6
exactly vertical
on valve spring retainer with a
pretension of 3 mm (small pointer on the dial
gauge). Turn dial gauge clockface until large
pointer is on " 0" .
050906
EXIT