Verification conditions
The engine oil temperature must be at least 30°C.
The power supply must be in good condition.
Verification procedure
Remove the ignition coils with output stages.
Remove the spark plugs with a spark plug wrench.
Check the compression using a compression gauge and adapter.
When completing the work, perform a fault memory scan of the engine control unit, delete all fault records that may have arisen as a result of the checks and repair work.
Note: After clearing the fault memory, you must generate an OBD code.
The meaning of compression
| Engine letter designation | New engine overpressure, bar | Maximum tolerance of excess pressure, bar | Difference between cylinders excess pressure, bar |
| BLR, BIX, BVY, BVX | 13,0-16.0 | 8,0 | max 3.0 |
| BLY, BVZ | 11,0-14,0 | 7,0 | max 3.0 |
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