Machining valve seat rings - RA05001192910X(05-2910)
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Preceding work:
Valve guides inspected (05-2845)
Operation no. of operation texts and work units or standard texts and flat rates
| Valve seats | machine.
NOTE:
Pay attention to operating instructions of tool manufacturer. Use SERDI form turning tool no. 41196. Use Hunger turning tool no. 23m or 24m. |
| Reference size (T) between valve stem end and | measure (see Inspecting, facing cylinder head |
| base of camshaft bearing | contact surface 01-4180). If size "T" is not achieved, no further correct valve clearance compensation exists. In this case, the valve seat or the cylinder head should be replaced. |
| Dimensions | maintain according to table. |
| Leaktightness with valve installed | check. |
| Valve seat width (b) | measure.
NOTE:
If necessary, correct valve seat width (b) with correction tools 23m and 24m (Hunger) (angles α and β).
|
| Valves | insert and measure clearance from valve stem end to base of camshaft bearing (T), see (01-4180)
. The valves should always be replaced when performing facing work on cylinder head and resetting the valve seats. |
DATA INLET, EXHAUST VALVE
| Valve seat width (b) | Inlet | 0.80 - 1.10 mm |
| Valve seat width (b) | Exhaust | 1.00 - 1.20 mm |
| Valve seat angle (α) | 45° | |
| Top correction angle (β) | 30° | |
| Bottom correction angle (Y) | 60° | |
| Permissible concentricity of valve seat | 0.03 mm | |
COMMERCIALLY AVAILABLE TOOLS
| Valve seat turning tool | e.g. | SERDI
GmbH Bregenzstr. 69 88131 Lindau |
| Form turning tool | e.g. | SERDI
GmbH Bregenzstr. 69 88131 Lindau Order no. 41196 |
| Cylinder head clamping device | e.g. | Hunger 81375 Munchen 70 Order no. 221.60.000 |
| Valve seat turning tool | e.g. | Hunger 81375 Munchen 70 Type VSDN 1/45/30 Order no. 236.03.308 |
| Test kit for valve seats | e.g. | Hunger 81375 Munchen 70 Order no. 216.93.300 |
| Turning tools for valve seat and correction angle (β) and (Y) 23m 24m | e.g. | Hunger 81375 Munchen 70 Order no. 216.64.235 Order no. 216.62.170 |