Mercedes-Benz 602, Service Manual

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6 In order to check with a mandrel press lightly
on the valve clearance compensating element
and thus check the clearance. Continue turning
the engine until the next cylinder in the firing
order can be checked.
A valve clearance compensating element must
only be replaced when a clearance of mm
is established between cam and element. If the
valve tappet sinks quicker than the others, or
has play at the cam base circle, the pre-stroke of
the valve tappet must be measured.
Measuring pre-stroke
7 The basic setting of the dial gauge has to be
undertaken before measurement. To do this
insert the dial gauge in the measuring bridge
601 589 08
21 00
and push in until there is a
preload of approx. 1 mm. The probe in the
measuring bridge must be in the basic position
(lower stop).
The basic setting must not be changed during
measurement.
8 In order to measure and note dimension
(cylinder head mating surface to valve tappet),
put measuring bridge on the cylinder head
mating surface over the valve tappet.
Note
If required, measure dimension on all valve
tappets.
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