Inspect Cooling System For Leaks - AR20.00-P-1010LW
Engine 177, 264, 274.9, 276.8, 626, 651, 654 in model 205
Engine 264, 274.9, 276.8, 642, 651, 654, 656 in model 253
Shown on engine 276.8
| 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 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 center section of lower engine compartment linings. | AR61.20-P-1105LW | |
| 4 | Slowly unscrew cap (1) at coolant expansion reservoir (2) and release overpressure if necessary. | ||
| 5 | Check coolant level and antifreeze content of coolant. | *BF20.00-P-1001-04A | |
| 6 | Screw tester cap (3) onto coolant expansion reservoir (2). | Fig 1 | |
| 7 | Connect pressure pump (4) at tester cap (3). | Fig 2 | |
| Check | |||
| 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. Engine 264, 274.9, 276.8, 626, 651, 654 in model 205 Engine 264, 274.9, 276.8, 642, 651 in model 253 Test pressure for pressure-testing the engine cooling system |
*BE20.30-P-1005-01A |
| Engine 177 in model 205 Test pressure for pressure-testing the cooling system | *BE20.30-P-1002-01D | ||
| 9 | Perform visual check of coolant-carrying component parts and connecting points for condition and coolant loss. | If a pressure loss exists ↓ Replace damaged assembly part. |
|
| Install | |||
| 10 | Drain off overpressure via valve at pressure pump (4). | Fig 2 | |
| 11 | Unscrew pressure pump (4) from tester cap (3). | ||
| 12 | Unscrew tester cap (3) at coolant expansion reservoir (2). | Fig 1 | |
| 13 | Switch off ignition. | ||
| 14 | Check coolant level and antifreeze content of coolant; correct if necessary. | *BF20.00-P-1001-04A | |
| 15 | Screw cap (1) onto coolant expansion reservoir (2). | ||
| 16 | Install front and center section of lower engine compartment linings. | AR61.20-P-1105LW |
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 |
RADIATOR OR EXPANSION RESERVOIR CAP
| Number | Designation | 1-stage cover latch | Engine 100, 102, 103, 104, 110, 111, 112, 113, 114, 115, 116, 117, 119, 120, 121, 123, 127, 129, 130, 133, 137, 139, 152, 155, 156, 157, 159, 166, 180, 256, 260, 264, 266, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 282, 285 2-stage latch cover Engine 601, 602, 603, 604, 605, 606, 607, 608, 611, 612, 613, 615, 616, 617, 621, 626, 628, 629, 640, 642, 646, 648, 651, 654, 656, 668 2-stage latch cover | ||
|---|---|---|---|---|---|
| BE20.30-P-1005-01A | Test pressure for pressure-testing the engine cooling system | Overpressure | bar | 1, 4 | 1, 4 |
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 sheet | BB00.40-P-0310-01A | ||||
| References to sheet specification | BB00.40-P-0310ZZ | ||||