Compression, Checking

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

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 .

-- Disconnect the connectors from the ignition coil and remove them from the ignition coils at the same time.

-- Remove the ignition coil bolts and remove the ignition coils.

-- Disconnect the connectors:

Fig 1: Identifying Connectors For Fuel Injectors

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove the spark plugs with the : 3122B .

-- Check the compression using the : VAG1763 , : VAG1381/1 and : VAG1381/5A .

Fig 2: Identifying Compression Tester And Adapter

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

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

-- Operate the starter until the tester no longer indicates a pressure increase.

Compression Pressure	Pressure
New	11.0 to 14.0 bar (159.54 to 203.05 psi)
Wear limit	7.0 bar (101.52 psi)
Maximum difference between cylinders	3.0 (43.51 psi)

-- Install the spark plugs. Refer to SPARK PLUGS, REPLACING

NOTE:

By separating the connections, malfunctions will be stored. After the test, check and erase the DTC memory.

-- Turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester: