A6 Quattro Sedan V8-4.2L (BVJ) (2007)
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Piston: Service and Repair
Piston and Connecting Rod, Assembly Overview
Piston and connecting rod, assembly overview
Note:
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Oil injector jet for piston cooling
1. Bolt
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Replace
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Lubricate threads and contact surface
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60 Nm plus an additional 90° (1/4 turn).
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Tighten to 60 Nm to measure radial play, do not turn further
2. Connecting rod bearing cap
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Mark for re-installation
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Mark affiliation to cylinder with paint
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Installation position of connecting rod pairs
3. Bearing shells
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Check that retaining tabs are secured
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Mark used bearing shells for reinstallation but not on running surface
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Over-sized bearings are available for reworked crankshaft connecting rod journals
4. Connecting rod
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Only replace as set
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Mark affiliation to cylinder with paint
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Installation position of connecting rod pairs
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Axial play for each new connecting rod pair: 0.20 to 0.27 mm
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Axial play wear limit: 0.30 mm
5. Piston pin
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If tight, heat piston to 60°C