Checking valve guides - RA05001192845X(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, exhaust valve guide (54) and (56) in longitudinal and transverse direction | check with gauging drift (4). Gauging drift 102 589 00 23 00 inlet valve guide dia. 8 mm. Gauging drift 117 589 03 23 00 exhaust valve guide dia. 9 mm. Gauging drift 102 589 01 23 00 inlet, exhaust valve guide dia. 7 mm. |
| When performing this step, check whether the "no go" stud (5) with the wear limit (+220) can be inserted into the valve guides (54) and (56) over its entire length (5 mm). If the gauging drift (5) can be inserted over its entire length, replace valve guide (05-2850) . | |
| Retaining groove (arrows) of valve stem seal on valve guides (54) and (56) | check. If the retaining groove is worn (arrows) with result that the valve stem seal is no longer tightly seated, replace valve guide (05-2850) . |
Special tools
NOTE:
Engine 119.96: as of engine end no. 011931 inlet and exhaust valve guides with ID 7 mm have been fitted.
Engine 119.97: as of start of production inlet and exhaust valve guides with ID 7 mm have been fitted.