Compression Pressure, Checking

WARNING: This page is about a different car, the 2016 Audi Q3 Quattro, 2016 Audi Q3, 2015 Audi Q3 Quattro, and 2015 Audi Q3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Compression Tester Kit :VAG1763

Test Sequence

NOTE:

Engine oil temperature: minimum 30 °C (86 °F)

Battery voltage at least 12.7 V

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Remove the ignition coils with power output stages. Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

-- Remove the spark plugs using a :3122B .

-- Check the compression pressure using the :VAG1763 and :VAG1763/6 .

NOTE:

For information on using the tester. Refer to the Operating Instructions.

-- Have a second technician operate the starter until the test stops showing an increase in pressure.

-- Operate starter until the tester shows no further pressure increase.

Compression Pressure

New Positive Pressure in Bar (psi)	Wear Limit Positive Pressure in Bar (psi)	Difference Between Cylinders Positive Pressure in Bar (psi)
11.0 to 14.0 (159.5 to 203)	7.0 (101.5)	Maximum 3.0 (43.5 psi)

-- Install the spark plugs.

-- Install the ignition coils with power output stages. Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

-- Install the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

NOTE:

By separating the connections, DTCs are stored to memory. After the test, check the DTC memory and erase, if necessary.

-- The faults were stored in the engine control module DTC memories Generate Readiness Code in Guided Functions using the Vehicle Diagnostic Tester because the connectors were disconnected and the engine was started.