Remove/Install Coolant Thermostat - AR20.10-P-2461MSA
Engine 256.9 in model 213, 238, 257, 290
MODIFICATION NOTES
| 13.07.2020 | Insertion of an operation step variant for the removal/installation of the catalytic converter/exhaust gas aftertreatment unit | Operation step 3.1/3.2 | |
| 13.07.2020 | DIN baseline date replaced with BA22.10-P-1003-02A, BA22.10-P-1005-02A and BA22.10-P-1004-02A | Operation step 4 |
| 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 | |
| Risk of injury. Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Risk of injury caused by scraping or cutting body parts on sharp vehicle parts | Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels. |
AS00.00-Z-0017-01A | |
| Topical note | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Topical note | Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | |
| Remove/install | |||
| 1 | Remove upper engine cover. | AR01.10-P-2405MSA | |
| 2 | Drain off coolant. | AR20.00-P-1142MSA | |
| 3.1 | Remove the catalytic converter. | Engine 256.9 in model 213, 238 up to model year 2020 with code 494 (US version) Engine 256.9 in model 257, 290 with code 494 (US version) |
|
| AR49.20-P-0100MSA | |||
| 3.2 | Remove exhaust gas aftertreatment unit. | Engine 256.9 in model 213, 238 as of model year 2020 with code 494 (US version) |
|
| AR49.20-P-1500MSA | |||
| 4 | Remove the front and center heat shield unde the catalytic converter. | Engine 256.9 in model 213, 238, 257, 290 except code 494 (US version) | |
| *BA22.10-P-1003-02A | |||
| *BA22.10-P-1005-02A | |||
| *BA22.10-P-1004-02A | |||
| 5 | Disconnect the coolant hose (14) from the connecting pipe and seal the openings using suitable protective covers. | AR20.20-P-7441-01RQ | |
| Fig 2 | |||
| 6 | Unscrew the screw (18). | *BA20.20-P-1002-02MR | |
| 7 | Unclip the electrical line on the connecting pipe for the coolant thermostat (12). | ||
| 8 | Remove the bracket of the oxygen sensor connector from the cylinder head. | *BA15.18-P-1004-01MR | |
| 9 | Remove the coolant hoses (2, 3) from the coolant thermostat (12) and seal the openings using suitable protective covers. | Fig 2 | |
| 10 | Release and disconnect the electrical connection (17) on the coolant thermostat (12). | ||
| 11 | Unscrew the screws (13) in reverse order of the tightening procedure and remove the coolant thermostat (12). | Coolant thermostat tightening procedure | AR20.10-P-2461-01MRT |
| *BA20.10-P-1001-01MR | |||
| Clean | |||
| 12 | Clean sealing surfaces on the coolant thermostat (12) and crankcase. | ||
| 13 | Install in the reverse order. |
12 V ON-BOARD ELECTRICAL SYSTEM ENGINE WIRING HARNESS
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA15.18-P-1004-01MRT | Screw, electrical connector bracket to cylinder head | Nm | 8 |
COOLANT THERMOSTAT, COOLANT PUMP
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA20.10-P-1001-01MRT | Screw/bolt, coolant thermostat to crankcase | Nm | 8 |
ENGINE RADIATOR, COOLANT HOSES AND LINES
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA20.20-P-1002-02MRT | Screw, coolant connecting pipe to cylinder head | Nm | 8 |
ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA22.10-P-1003-02A | Bolt, heat shield to engine support | Nm | 12 |
ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA22.10-P-1004-02A | Screw, heat shield to crankcase/catalytic converter bracket/engine mount heat shield | Nm | 8 |
ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Engine 256 | |
|---|---|---|---|
| BA22.10-P-1005-02A | Bolt, heat shield to timing case | Nm | 8 |