Inspect cooling system for leaks - AR20.00-P-1010MCU
ENGINES 132.910 in MODEL 451.3/4
| Checking | |||
| Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by 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 coolant | AH20.00-N-2080-01A | ||
| 1 | Remove maintenance flap (3) | ||
| 2 | Turn cooling system cap (1) on engine radiator (2) a half turn counterclockwise, relieve the pressure and then unscrew the cooling system cap (1) | ||
| 3 | Check coolant level in expansion reservoir (2), correct if necessary. | ||
| Coolant specifications | Sheet 310.1 | Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1 | |
| Anticorrosion/antifreeze agents (Sheet 325.0) | Sheet 325.0 | Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1 | |
| 4 | Attach pressure pump on expansion reservoir (2) | Figure | |
| 5 | Apply a pressure of a max. of 1.6 bar to the cooling system | Figure | |
| 6 | Remove interior flap above engine | If a pressure drop was established in the cooling system. | AR88.40-P-1100-03MCC |
| Risk of death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. | AS00.00-Z-0010-01A | |
| 7 | Raise vehicle using the vehicle lift and remove underfloor paneling | If a pressure drop was established in the cooling system. Cordless drill/driver, cordless drill |
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| 8 | Check all components of cooling system for leaks; establish coolant loss and remove it | If a pressure drop was established in the cooling system. | |
| 9 | Lower vehicle with vehicle lift | ||
| 10 | Disconnect pressure pump on expansion reservoir (2) and check coolant level in expansion reservoir (2); correct if necessary | After removing leakage in the cooling system. | |
| Figure | |||
| Coolant specifications | Sheet 310.1 | Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1 | |
| Anticorrosion/antifreeze agents (Sheet 325.0) | Sheet 325.0 | Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1 | |
| 11 | Attach pressure pump to expansion reservoir (2) and apply a pressure to the cooling system again of a maximum of 1.6 bar | After removing leakage in the cooling system. |
Figure |
| 12 | Raise vehicle with vehicle lift | ||
| 13 | Install underfloor paneling | After removing leakage in the cooling system. | |
| 14 | Lower vehicle with vehicle lift | ||
| 15 | Install interior flap above engine | After removing leakage in the cooling system. | AR88.40-P-1100-03MCC |
| 16 | Detach pressure pump on expansion reservoir (2) | Figure | |
| 17 | Seal expansion reservoir (2) with cap (1) | ||
| 18 | Install maintenance flap (3) |