Remove/Install Timing Chain Tensioning Rail - AR05.10-P-8127MRA
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
| Remove/install | |||
| 1 | Remove cylinder head cover | AR01.20-P-5014MRA | |
| 2 | Remove the chain tensioner (3) | AR05.10-P-7800MRA | |
| 3 | Remove camshaft positioner (4) for exhaust camshaft | AR05.20-P-7201MRA | |
| 4 | Remove cap (10) to the side of tensioning rail (2) | ||
| 5 |
Remove sliding rail bolt (1) Specified engine oils (service) - Overview |
BB00.40-P-0223-02A | |
| Fig 2 | |||
| Fig 3 | |||
| 6 | Remove tensioning rail (2) upwards | ||
| Check | |||
| 7 |
Check slide rail (5, 6) with endoscope for wear, galling and damage 000 588 01 21 00 Endoscope |
For wear, galling or damage ↓ |
WS01.00-P-0097B |
| Replace slide rails (5, 6). | AR05.10-P-8480MRA | ||
| 8 | Check tensioning rail (2) for wear, galling and damage | For wear, galling or damage ↓ Replace tensioning rail (2). |
|
| 9 | Install in the reverse order | ||
| Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear buttoned-up and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 10 | Carry out an engine test run, in doing so check engine for leaktightness | ||
| 11 | Install upper engine cover |