Inspect Cooling System For Leaks - AR20.00-P-1010MNG
Engine 177 in model 253
Shown on engine 276.8
| Risk of injury to skin and eyes suffering scalding from contact with hot coolant spray. 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 coolant | AH20.00-N-2080-01A | ||
| Notes on coolant level | AH20.00-P-1142-01CW | ||
| Remove | |||
| 1 | Switch on ignition | ||
| 2 | Adjust heater to maximum heat output | ||
| 3 | Remove front and central sections of the lower engine compartment paneling | AR61.20-P-1105LW | |
| 4 | Remove cap (1) at coolant expansion reservoir (2) | ||
| Check | |||
| 5 | Check coolant level and antifreeze content of coolant; correct if necessary | *BF20.00-P-1001-02LA | |
| *BF20.00-P-1001-04A | |||
| 6 | Attach tester cap (3) to coolant expansion reservoir (2) | Fig 1 | |
| 7 | Connect pressure pump (4) at tester cap (3) | Fig 2 | |
| 8 | Apply a test pressure to the engine cooling system for 2 minutes | Do not exceed the specified test pressure. Damage will occur otherwise to the engine cooling system. Test pressure for pressure-testing the cooling system |
*BE20.30-P-1002-01D |
| 9 | Perform visual inspection of the condition of the coolant conducting assembly parts and connections and coolant loss | In the event of pressure loss ↓ Replace damaged assembly part. |
|
| 10 | Drain off overpressure over valve at pressure pump (4) | Fig 2 | |
| 11 | Disconnect pressure pump (4) from tester cap (3) | Fig 2 | |
| 12 | Remove tester cap (3) on coolant expansion reservoir (2) | Fig 1 | |
| 13 | Check coolant level and antifreeze content of coolant; correct if necessary | *BF20.00-P-1001-02LA | |
| *BF20.00-P-1001-04A | |||
| Install | |||
| 14 | Attach cap (1) to coolant expansion reservoir (2) | ||
| 15 | Install front and central section of the lower engine compartment paneling | AR61.20-P-1105LW | |
| 16 | Switch off ignition |
COOLING SYSTEM CHECK VALUES
| Number | Designation | Engine 177 | ||
|---|---|---|---|---|
| BE20.30-P-1002-01D | Test pressure for pressure-testing the cooling system | Overpressure | bar | 1, 4 |
COOLING SYSTEM
| Number | Designation | Engine 177 in model 253 | |||
|---|---|---|---|---|---|
| BF20.00-P-1001-02LA | Cooling system | Workshop replacement amount | Main circuit | Liter | ≈ 11, 1 |
| Low-temperature circuit | Liter | ≈ 4, 6 | |||
| Antifreeze/water | Down to -37°C | % | 50/50 | ||
| -38°C and below | % | 55/45 | |||
| Specifications for Operating Fluids | BB00.40-P-0310-01A | ||||
| Specifications for Operating Fluids | BB00.40-P-0325-06A | ||||
| Specifications for Operating Fluids | BB00.40-P-0326-06A | ||||
COOLANT MIXING RATIO
| Number | Designation | Engine all (4xWD, CAR, smart) | |||
|---|---|---|---|---|---|
| BF20.00-P-1001-04A | Coolant mixing ratio | Antifreeze/water | Up to -37°C | % | 50/50 |
| As of -38°C | % | 55/45 | |||
| Overview and specifications | BB00.40-P-0310-01A | ||||
| References to specification | BB00.40-P-0310ZZ | ||||