Remove/Install Coolant Thermostat - AR20.10-P-2460MRA
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
| 06.04.2020 | Remove screw (12). | Operation step 6. | |
| 06.04.2020 | Remove bracket (11). | Operation step 8. |
Shown on engine 274.9 in model 205 with code 920 (Gasoline direct injection with stratified charge)
| 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 pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | ||
| Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | ||
| Remove/install | |||
| 1 | Remove charge-air distributor. | AR09.41-P-8683MRA | |
| 2 | Drain off coolant. | AR20.00-P-1142LW | |
| 3 | Remove coolant hose (1) from coolant thermostat (5). | Fig 3 | |
| 4 | Remove coolant hose (2) from coolant thermostat (5) and seal openings with protective covers. | AR20.20-P-7441-01RQ | |
| Fig 2 | |||
| 5 | Remove screw/bolts (3). | *BA20.10-P-1008-01AC | |
| 6 | Remove screw (12). | ||
| 7 | Remove bolts (8) and place bleed line (10) to one side. | *BA00.10-P-1002-04A | |
| 8 | Remove bolts (9) and remove bracket (11). | ||
| 9 | Release and disconnect electrical connector of coolant thermostat heating element (R48). | ||
| 10 | Remove coolant hose (4) from coolant thermostat (5) and seal openings with protective covers. | AR20.20-P-7441-01RQ | |
| Fig 2 | |||
| 11 | Remove coolant hose (7) from coolant thermostat (5) and seal openings with protective covers. | Engine 274.9 in model 205 with code 920 (Direct fuel injection with stratified charging) | |
| Fig 2 | |||
| Fig 3 | |||
| 12 | Remove screws (5s). | *BA20.10-P-1006-01AC | |
| 13 | Remove coolant thermostat (5) from crankcase. | ||
| 14 | Remove coolant hose (6) from coolant thermostat (5), seal all openings with protective covers and remove coolant thermostat (5). | Fig 2 | |
| Fig 3 | |||
| 15 | 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 closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 16 | Carry out engine test run and check engine for proper operation and leak tightness. | ||
| 17 | Install the front and lower center engine compartment lining. | AR61.20-P-1105LW | |
| 18 | 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 | M6 X 1 | Nm | 9 | 13 |
COOLANT PUMP, COOLANT THERMOSTAT
| Number | Designation | Engine 274 | |
|---|---|---|---|
| BA20.10-P-1006-01AC | Bolt, coolant thermostat to crankcase/cylinder head | Nm | 9 |
COOLANT PUMP, COOLANT THERMOSTAT
| Number | Designation | Engine 274 | ||
|---|---|---|---|---|
| BA20.10-P-1008-01AC | Screw, coolant line to coolant pipe/cylinder head/crankcase/coolant thermostat/coolant hose/timing case | M6 | Nm | 9 |