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COMPRESSION PRESSURE, CHECKING Audi A4 B8

2.0l - Cylinder Head, Valvetrain - Engine Code(s): Caeb (avant) 3 illustrations ~180 words

COMPRESSION PRESSURE, CHECKING

Special tools and workshop equipment required

  1. Spark Plug Removal Tool 3122 B
  2. Ignition Coil Puller T40039
  3. Compression Tester V.A.G 1763

Test Sequence

Note. Engine oil temperature min. 30°C (86°F) Battery voltage at least 12.7 V

Remove the engine cover -arrows-.

Scheme 393

Scheme 393
Scheme 393

Remove the bolts on the ignition coil connector strip.

Release the connector -arrows- and disconnect all the connectors at the same time from the ignition coils.

Scheme 394

Scheme 394
Scheme 394

Remove the ignition coils with the T40039.

Scheme 395

Scheme 395
Scheme 395

Remove the spark plugs using a 3122 B.

Check compression using V.A.G 1763 and V.A.G 1763/6.

Note. Using tester see operating Instructions.

Operate starter until tester shows no further pressure increase.

Compression Pressure

New Bar Positive PressureWear Limit Bar Positive PressureDifference Between Cylinders Bar Positive Pressure
11.0 to 14.07.0Max. 3.0

Install the spark plugs. Refer to MAINTENANCE PROCEDURES

Install the ignition coils with output stages. Refer to Removal and Installation .

Note. By separating the connections, Diagnostic Trouble Codes (DTCs) are stored to memory. After the test, check the DTC memory and erase, if necessary.

Check the Engine Control Module (ECM) DTC memory. Refer to vehicle diagnostic, tester under "Guided Fault Finding".