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2009
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A8 Quattro Sedan (4E2) V8-4.2L (BVJ)
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Compression Check
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Specifications
Compression Check: Specifications
Compression Pressure
Engine oil temperature at least 30° C
Battery voltage at least 12.5 V
New
10.0 to 14.0 bar pressure
Wear limit
9.0 bar pressure
Maximum difference between cylinders
3.0 bar pressure