Check cylinders for leaks - AR01.00-P-1300EL
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ENGINE 157, 276, 278 in MODEL 212, 218
Shown on engine 276.9 on the right
| Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 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 | |
| Remove/install | |||
| 1 | Bring engine up to operating temperature (approx. 80°C) | ||
| 2 | Switch off ignition and remove transmitter key from electronic ignition lock control unit | ||
| 3 | Remove spark plugs | ||
| AP15.10-P-1580EW | |||
| 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 | |
| 4 | Unscrew cap (1) for coolant expansion reservoir (2) | ||
| 5 | Remove oil filler cap (3) | ||
| 6 | Detach charge air cooler and press to the front with attached coolant lines | ENGINE 276.8 in MODEL 212 | |
| AR09.41-P-6819ELS | |||
| 7 | Position piston of cylinder to be checked at top dead center with the TDC detection device | ||
| Figure | |||
| 8 | Connect up cylinder leakage tester (04) | AR01.00-P-1300-01VA | |
| Cylinder leakage tester (pressure loss) | |||
| Figure | |||
| Check | |||
| 9 | Pressurize cylinder with compressed air and read off pressure loss on cylinder leakage tester (04) | Cylinder leakage: permissible loss total indication | *BE01.00-P-1001-02Z |
| Cylinder leaktightness: permissible losses at valves and cylinder head gasket | *BE01.00-P-1002-02Z | ||
| Cylinder leaktightness: permissible losses at pistons and piston rings If the crankshaft rotates: ↓ Install retaining lock for crankshaft. |
*BE01.00-P-1003-02Z | ||
| AR03.30-P-5000EL | |||
| 10 | Check other cylinders in firing order of the engine | AR01.00-P-1300-03MM | |
| 11 | Install in the reverse order |
CYLINDER LEAKAGE
| Number | Designation | ENGINE ALL | |
|---|---|---|---|
| BE01.00-P-1001-02Z | Cylinder leakage: permissible loss total indication | % | ≤ 25 |
CYLINDER LEAKAGE
| Number | Designation | ENGINE ALL | |
|---|---|---|---|
| BE01.00-P-1002-02Z | Cylinder leaktightness: permissible losses at valves and cylinder head gasket | % | ≤ 10 |
CYLINDER LEAKAGE
| Number | Designation | ENGINE ALL | |
|---|---|---|---|
| BE01.00-P-1003-02Z | Cylinder leaktightness: permissible losses at pistons and piston rings | % | ≤ 20 |