Compression, Checking

Fig 1: Identifying Special Tools

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Special tools and workshop equipment required 

• Spark Plug Removal Tool:3122 B 
• Compression Tester Kit:V.A.G 1763 
• Compression Tester Kit - Adapter 5A:V.A.G 1381/5A 
• Fuel Injection Gauge Kit - Adapter V.A.G 1381/1:V.A.G 1381/1 
• Puller - Ignition Coil:T10095A 
  Fig 2: Identifying Ignition Coil Puller T10095 A

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• Elbow Assembly Tool:T10118 
  Fig 3: Elbow Assembly Tool T10118

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Test Conditions

• The engine oil temperature is at least 30 °C
• The battery voltage must be at least 11.5V.
• The selector lever must be in the "P" or "N" position.

Test Sequence

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

-- Remove the spark plugs using the Spark Plug Removal Tool:3122 B  .

-- Check the compression using the Compression Tester Kit:V.A.G 1763  , Compression Tester Kit - Adapter 1:V.A.G 1381/1  and Compression Tester Kit - Adapter 5A:V.A.G 1381/5A  .

Fig 4: Identifying Compression Tester And Adapter

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-- Have a second technician start the engine long enough until the tester shows there is no longer an increase in pressure.

Compression values:

-- Install the spark plugs using the Spark Plug Removal Tool:3122 B  and tighten.

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

-- Connect the Vehicle Diagnostic Tester.

-- To do so, turn on the ignition and select the following menu item on the Vehicle Diagnostic Tester:

• 0001 - Generate readiness code