Remove/Install Front Cover On Cylinder Head - AR01.30-P-5700MRB
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
Shown on Engine 274.9 in model 205.040
Fig 1: Front Cover On Cylinder Head Components Location - Engine 274.9 In Model 253 (Shown In Model 205.040)
| Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| Risk of injury to skin and eyes due to handling of Engine oil. Risk of poisoning caused by swallowing Engine oil | Wear protective gloves, protective clothing and safety glasses. Do not fill Engine oil into beverage containers. |
AS18.00-Z-0001-01A | |
| Notice | Notes on threaded connections with aluminum screws/bolts | AH00.00-P-0006-01RM | |
| Notice | Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | |
| Remove/install | |||
| 1 | Remove upper Engine cover | ||
| 2 | Remove Engine air intake duct upstream of air filter | ||
| 3 | Unscrew cap from expansion reservoir and relieve pressure in the low-temperature circuit | ||
| 4 | Remove charge air pipe (2) | ||
| 5 | Remove line (4) from front cover (1) | *BA00.10-P-1002-04A | |
| 6 | Remove charge air cooler (5) and place to one side with connected coolant lines | AR09.41-P-6819MRA | |
| 7 | Release and disconnect electrical connections of the inlet- and exhaust camshaft (Y49/1, Y49/2) solenoids | ||
| 8 | Remove oil filter element (3) | ||
| Engine 274.910 in model 205 Engine 274.920 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 274.920 in model 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AP18.00-P-0101CWI | ||
| Engine 274.920 in model 205 with code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 274.920 in model 253 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AP18.00-P-0101CWE | ||
| 9 | Unscrew screw/bolts (9) | *BA01.30-P-1003-01Y | |
| 10 | Remove front cover (1) and take out Notes on sealant path for front cover to cylinder head xxx | The sealing surfaces can be damaged otherwise. |
AH01.30-P-1000-02MR |
| Sealant, Loctite 5970, 50 ml | *BR00.45-Z-1013-01A | ||
| Fig 2 | |||
| 11 | Remove solenoids on inlet and exhaust camshaft (Y49/1, Y49/2) | Only when replacing front cover (1). | AR05.20-P-7295MRA |
| Clean | |||
| 12 | Clean sealing surfaces on front cover (1), cylinder head and cylinder head cover | The sealing surfaces can be damaged otherwise. |
AR01.00-P-0050-01A |
| Loctite 7200 | *BR00.45-Z-1038-04A | ||
| Loctite 7063 (400 ml) cleaning spray | *BR00.45-Z-1046-04A | ||
| 13 | Install in the reverse order | ||
| Check | |||
| 14 | Check and correct oil level | ||
| AP18.00-P-1811MP | |||
| 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 closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 15 | Perform an Engine test run and check Engine for proper operation and leak tightness | ||
| 16 | Install upper Engine cover |
METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143
| Number | Designation | 8.8 | 10.9 | |
|---|---|---|---|---|
| BA00.10-P-1002-04A | M6X1 | Nm | 9 | 13 |
CYLINDER HEAD
| Number | Designation | Engine 274 | ||
|---|---|---|---|---|
| BA01.30-P-1003-01Y | Bolt, front cover to cylinder head/cylinder head cover | M6 | Nm | 9 |
| M8 | Nm | - | ||
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1013-01A | Sealant, Loctite 5970, 50 ml | A 003 989 98 20 10 |
| BR00.45-Z-1038-04A | Loctite 7200 | A 010 989 90 71 |
| BR00.45-Z-1046-04A | Loctite 7063 (400 ml) cleaning spray | A 001 986 71 71 09 |