A6 Quattro Sedan V8-4.2L (BVJ) (2007)
‹› Radial clearance, measuring => [ Connecting Rod Radial Clearance, Measuring ] See: Testing and Inspection
‹› Over-sized bearings are available for reworked crankshaft connecting rod journals.
4
Connecting rod
‹› Only replace as set
‹› Mark affiliation to cylinder with paint => [ Mark connecting rod ]
‹› Installation position of connecting rod pairs => [ Connecting rod, installed location ]
‹› Axial play for each new connecting rod pair: 0.20 to 0.27 mm
‹› Axial play wear limit: 0.30 mm
‹› Radial clearance, measuring => [ Connecting Rod Radial Clearance, Measuring ] See: Testing and Inspection
5
Piston pin
‹› if tight, heat piston to 60 °C
‹› Removing and installing using a drift (VW 222 A)
6
Circlip
7
Piston
‹› Installation position of pistons => [ Piston installation position ]
‹› Piston and cylinder dimensions => [ Piston and Cylinder Dimensions ] See: Piston/Specifications
‹› Checking => [ Checking piston ]
‹› Install with piston ring compressor
‹› Measuring cylinder bore => [ Measuring cylinder bore ]
8
Piston rings
‹› Offset gaps by 120°
‹› Use piston ring pliers for removal and installation
‹› "TOP" marking or inscribed side must point to piston head
‹› Gap, measuring => [ Piston ring end gap, measuring ]
‹› Measuring side clearance => [ Measuring piston ring side clearance ]
Piston ring end gap, measuring
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Slide piston ring down from above at a right angle to cylinder wall until it is approx. 15 mm from bottom edge of cylinder.
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When sliding in, use a piston without piston rings.