A4 Quattro Sedan V6-3.0L (AVK) (2002)
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External micrometer 75-100 mm
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Measure approximately 10 mm from the lower edge at a 90°angle to piston pin axis.
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Deviation from nominal dimension: maximum 0.04 mm
Specified dimension, Refer to Piston, Engine, Specifications, piston and cylinder measurements
Fig. 4 Checking cylinder bore
Special Tools and Equipment
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Inner bore gauge 50-100 mm
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Measure diagonally at 3 positions horizontally -A- and lengthwise -B-.
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Deviation from nominal dimension: maximum 0.08 mm
Specified dimension, Refer to Piston, Engine, Specifications, piston and cylinder measurements
Fig. 5 Piston installed position and allocation piston/cylinder
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Mark installed position and allocation to cylinder on piston head using chalk or water-proof felt pen.
Note: Do not use a center punch or scribe, since the piston head coating will be damaged.
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Installation position:
Arrow on piston head points to belt pulley side