Check Low Temperature Circuit For Leaktightness - AR09.41-P-1011MNB
Engine 178 in model 190
| Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. | No parts of the body or limbs should be within the operating area when the components are moving. | AS00.00-Z-0011-01A | |
| 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 overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| Notice | Notes on coolant | AH20.00-P-2080-01KOA | |
| Remove | |||
| 1 | Slowly open and remove cap from expansion reservoir (1) | ||
| Check | |||
| 2 | Check coolant level and antifreeze content of coolant in low temperature circuit and correct if necessary | *BF20.00-P-1001-02U | |
| 3 | Screw tester cap (2) onto expansion reservoir (1). | Fig 1 | |
| 4 | Connect pressure pump (3) at tester cap (2) | Fig 2 | |
| 5 | Apply compressed air to low temperature circuit for 2 minutes at the test pressure | Do not exceed the specified test pressure. Damage can occur otherwise on the low temperature circuit. |
|
| Test pressure for pressure-testing the low temperature circuit | *BE20.30-P-1001-01D | ||
| 6 | Perform a visual inspection on the assembly parts carrying coolant | In the event of pressure loss | |
| Install | |||
| 7 | Actuate pressure relief button on pressure pump (3) and relieve the pressure | Fig 2 | |
| 8 | Unscrew tester cap (2) at the expansion reservoir (1) | Fig 1 | |
| Check | |||
| 9 | Check coolant level and antifreeze content coolant | If necessary | |
| *BF20.00-P-1001-02U | |||
| 10 | Screw cap onto expansion reservoir (1) |
COOLING SYSTEM CHECK VALUES
| Number | Designation | Engine 178 | ||
|---|---|---|---|---|
| BE20.30-P-1001-01D | Test pressure for pressure-testing the low temperature circuit | Overpressure | bar | 1, 4 |
COOLING SYSTEM
| Number | Designation | Engine 178 in model 190 (except 190.381) | Engine 178 in model 190.381 | |||
|---|---|---|---|---|---|---|
| BF20.00-P-1001-02U | Cooling system | Workshop replacement amount | Main circuit | Liter | ≈ 14, 2 | ≈ 12, 6 |
| Low-temperature circuit | Liter | ≈ 7, 3 | ≈ 9, 1 | |||
| Antifreeze/water | Down to -37°C | 50/50 | ||||
| -38°C and below | 55/45 | |||||
| Fluids specifications | BB00.40-P-0325-06A | - | ||||
| Fluids specifications | BB00.40-P-0326-06A | - | ||||
| Fluids specifications | - | - | ||||
| -25_°C | - | 40/60 | ||||
| Fluids specifications | - | BB00.40-P-0325-06A | ||||
| Fluids specifications | - | BB00.40-P-0326-06A | ||||