A6 Quattro Sedan V8-4.2L (BVJ) (2007)
^
Removing and installing using a drift VW 222 A
6. Circlip
7. Piston
^
Installation position of pistons
^
Checking
^
Install with piston ring compressor
^
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
^
Measuring side clearance
Piston ring end gap, measuring
-
Slide piston ring down from above at a right angle to cylinder wall until it is approximately 15 mm from bottom edge of cylinder.
-
When sliding in, use a piston without piston rings.
Measuring piston ring side clearance
-
Clean ring groove of piston before checking.