Checking valve guides - RA05001202845X(05-2845)
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:
Cylinder head removed.
Valves removed.
| Inlet and exhaust valve guides | check with gauge in lengthwise and transverse direction. Check whether the no-go stud with the wear limit size (+220) can be inserted into the valve guides over its entire height (5 mm). If the gauge can be inserted over its entire height, replace valve guide. |
| Seat of valve stem seal at inlet and exhaust valve guides | check. If seat is worn so that valve stem seal is no longer properly seated, replace valve guide. |
VALVE GUIDES REFERENCE
| Engine | Up to engine end no. | Valve guide | Valve guide inner dia. | Gauge (special tool) | |
|---|---|---|---|---|---|
| outer dia. | Inlet | Exhaust | |||
| 120.980 | 016 | 879 13.50 mm | 7 mm | 102 589 01 23 00 | |
| 8 mm | 102 589 00 23 00 | ||||
| 120.981 | 000 346 | 13.50 mm | 7 mm | 102 589 01 23 00 | |
| 8 mm | 102 589 00 23 00 | ||||
| Engine | As of engine end no. | ||||
| 120.980 | 016 880 | 12.50 mm | 7 mm | 102 589 01 23 00 | |
| 7 mm | 102 589 01 23 00 | ||||
| 120.981 | 000 347 | 12.50 mm | 7 mm | 102 589 01 23 00 | |
| 7 mm | 102 589 01 23 00 | ||||
Special tools