Test compression pressure - AR01.00-P-1200CMG
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ENGINE 156 in MODEL 204, 212
| Remove/install | |||
| Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof | Keep body parts and limbs well clear of moving parts. | AS00.00-Z-0011-01A | |
| Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. |
AS00.00-Z-0005-01A | |
| 1 | Bring engine to operating temperature (approx. 80°C) | ||
| 2 | Switch off ignition | ||
| 3 | Remove spark plugs | AR15.12-P-1010CMG | |
| 4 | Connect electrical supply lines for compression recorder (01) | See Crank engine with starter. | AR01.10-P-0110CW |
| 5 | Crank engine using contact switch of compression recorder (01) for approx. 5 seconds | ||
| Checking | |||
| 6 | Press compression recorder (01) on tapped bore of spark plug for first cylinder | ||
| 7 | Crank the engine with the contact switch of the compression recorder (01) until the rise in pressure is no longer indicated on the compression recorder (01) | ||
| 8 | Carry out testing procedure in the cylinder order on remaining cylinders in the same way | ||
| 9 | Compare measurements obtained with permissible pressures | Compression installation tolerance or new value | *BE01.00-P-1001-01B |
| Compression pressure permissible difference between individual cylinders | *BE01.00-P-1002-01B | ||
| Compression pressure wear limit or limit value If pressure indicated is less than the minimum compression pressure or if permissible difference between individual cylinders is exceeded: ↓ |
*BE01.00-P-1003-01B | ||
| Check cylinder leakage. | AR01.00-P-1300CMG | ||
| 10 | Install in the reverse order |
COMPRESSION PRESSURE
| Number | Designation | Engine 156 | |
|---|---|---|---|
| BE01.00-P-1001-01B | Compression installation tolerance or new value | bar | 12...16 |
| BE01.00-P-1002-01B | Compression pressure permissible difference between individual cylinders | bar | ≤ 2.0 |
| BE01.00-P-1003-01B | Compression pressure wear limit or limit value | bar | 10 |