Test compression pressure - AR01.00-P-1200MCU
ENGINE 132.910 in MODEL 451.3/4
| 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 | |
| Remove/install | |||
| 1 | Bring engine up to operating temperature of approx. 80°C | ||
| 2 | Switch off ignition | ||
| 3 | Remove spark plugs | ||
| AP15.10-P-1580MCC | |||
| Check | |||
| 4 | Route electrical line (2) for compression recorder (1) between air filter housing (3) and throttle valve actuator (M16/6) to the starter (M1) | Fig 2 | |
| Risk of death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. | AS00.00-Z-0010-01A | |
| 5 | Raise vehicle with vehicle lift | ||
| 6 | Detach connector (4) from starter (M1) | ||
| 7 | Attach terminals (5, 6) of compression recorder (1) to the starter (M1) | ||
| 8 | Lower vehicle with vehicle lift | ||
| 9 | Turn engine using contact switch on compression recorder (1) for about 5 seconds | ||
| 10 | Insert compression recorder (1) with appropriate connector into spark plug bore | ||
| 11 | Crank engine with contact switch at the compression recorder (1) until an increase in pressure is no longer indicated on the compression recorder (1) | ||
| 12 | Carry out test procedure at remaining cylinders in the same way | ||
| 13 | Compare measurements obtained with the permissible values | Compression pressure new value | *BE01.00-P-1001-01G |
| Compression pressure: wear limit or limit value If the wear limit is not reached, cylinder leakage must be checked on the respective cylinder: | *BE01.00-P-1002-01G | ||
| ↓ Check cylinders for leaks |
AR01.00-P-1300MCU | ||
| 14 | Install in the reverse order | ||
| 15 | Read out fault memory using the diagnostic system and delete | ||
| AD00.00-P-2000-04MCC |
CHECK VALUES FOR COMPRESSION PRESSURE
| Number | Designation | ENGINE 132.910 | |
|---|---|---|---|
| BE01.00-P-1001-01G | Compression pressure new value | bar | 15 |
CHECK VALUES FOR COMPRESSION PRESSURE
| Number | Designation | ENGINE 132.910 | |
|---|---|---|---|
| BE01.00-P-1002-01G | Compression pressure: wear limit or limit value | bar | ≈ 11 |