Remove/Install Valves - AR05.30-P-3511MRA
WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.
Engine 274.9 in model 205
Engine 274.9 in model 253
MODIFICATION NOTES
| 07.08.2019 | Reference document AH05.30-P-1000-02SZ added. | Operation step 4. |
| Remove/install | |||
| 1 | Remove the upper valve spring retainers (2) and valve springs (3). | AR05.30-P-3500MRA | |
| 2 | Close the compressed air valve on the assembly device (01) and let compressed air out of the assembly device (01). | Fig 2 | |
| 3 | Remove cylinder head (1) from assembly device (01). | Fig 2 | |
| 4 | Remove the valves (6). General information on checking valves, valve seats and valve guides |
AH05.30-P-1000-02SZ | |
| Check | |||
| 5 | Check valve stems for formation of burrs and pitting. | If ridging is present of the valve stems, ↓ Deburr valve stem. If pitting is present on the valve stems, ↓ Replace valves (6) |
|
| 6 | Check the valve seats for pitting and cracks. | If pitting or cracks are present on the valve seats, ↓ Replace cylinder head (1). |
AR01.30-P-5800MRB |
| 7 | Install in the reverse order. |