Mercedes-Benz 602, Service Manual

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The hardened valve seat inserts (sintered metal)
had a high spot (arrow) on inside of the insert for
a short time.
PO5
This high spot must be turned off in order to
machine the valve seat insert. There is a repair
valve seat insert with larger outside diameter as
a replacement part for all valve seat insert
designs. After replacing the valve seat inserts
the location of the hydraulic valve clearance
compensating elements must be checked and
corrected, if necessary (05211).
Conventional tools
Cylinder head clamping fixture
e. g. Hunger,
D-8000
70
Part No. 221.60.000
Seat insert lathe tool, 2 e. g. Hunger,
D-8000
70
Part No. 220.03-l 10
Valve seat turning equipment, model VDSNL 45 30
e. g. Hunger,
D-8000
70
Part No. 236.03.308
Test set for valves
e. g. Hunger,
D-8000
70
Part No. 216.93.300
correction steel No. 13 for
lower correction angle
e. g. Hunger,
D-8000
70
Part No. 216.64.622
Internal-thread-measuring equipment (range 25 60 mm) e. g. Mahr,
D-7300 Esslingen
Part No. 844
External micrometer (range 25 50 mm) e. g. Mahr,
D-7300 Esslingen
Part No. 40 S