audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Measuring piston projection at "TDC" > < Measuring radial clearance of conrods
Removing and installing pistons
Removing and installing pistons
Special tools and workshop equipment required
   
t  Drift -VW 222 A-
t  Piston ring clamp, commercially available
Removing
l  Engine secured to engine and gearbox support → Chapter.
–  Remove cylinder head → Chapter.
–  Remove sump → Chapter.
–  Mark installation position and matching of conrod bearing caps to cylinder and to conrods for reinstallation → Item.
–  Unbolt conrod bearing caps.
–  Pull out pistons upwards with conrods.
  Note
If piston pin is difficult to remove, heat piston to approx. 60 °C.
–  Take circlip out of piston pin boss.
–  Use drift -VW 222 A- to drive out piston pin.
Installing
Installation is carried out in the reverse order; note the following:
l  Tightening torques → Chapter „Pistons and conrods - exploded view“
  Note
Renew the bolts tightened with specified tightening angle.
–  Oil running surfaces of bearing shells.
–  Install pistons using piston ring clamp.
Installation position:
l  Pistons → Fig.
l  Bearing shells in conrods → Fig.
–  Install conrod bearing caps according to markings.
–  Install sump → Chapter.
–  Install cylinder head → Chapter.
  W00-0236

Measuring piston projection at "TDC" > < Measuring radial clearance of conrods