Piston And Connecting Rod Overview

• 45 Nm + an additional 90° (1/4) turn.
• Always replace.
• Use an old bolt to measure the radial play.
• Do not turn the additional 90° (1/4) turn when measuring the radial play.
• Lubricate the threads and contact surface.

• Pay attention to the installed position.
• Mark the affiliation to the cylinder -A-.
• Installed position: The marks -B- point to the belt pulley side.
• Due to the way the separated connecting rod breaks (cracks), the cap fits only in one position and only onto the respective connecting rod.
• Separating a new connecting rod. Refer to NEW CONNECTING ROD, SEPARATING .

• Note the installed position, refer to BEARING SHELL, INSTALLED POSITION .
• Do not interchange used bearing shells (mark them).
• Axial play:

  New: 0.10 to 0.35 mm

  Wear limit: 0.4 mm

• Measure radial clearance using Plastigage®:

  New: 0.020 to 0.060 mm

  Wear limit: 0.090 mm

  Do not rotate the crankshaft when measuring the radial play.

27 Nm

• Opening pressure: 1.6 to 1.9 bar.

• For piston cooling.
• See the notes at the beginning of the OIL PAN/OIL PUMP OVERVIEW .

• If difficult to move, heat the piston to approximately 60 °C (140 °F).
• Remove and install using the pilot drift VW 222 A.

• Mark the installed position and cylinder allocation.
• The arrow on the piston face points toward the belt pulley side.
• Install using a piston ring compressor.
• Checking, refer to PISTON, CHECKING .
• Checking the cylinder bore, refer to CYLINDER BORE, CHECKING .
• For the correct piston and cylinder dimensions, refer to PISTON AND CYLINDER DIMENSIONS .

• Offset gaps by 120°.
• Use piston ring pliers for removal and installation.
• The "TOP" mark must face up toward the piston crown.
• Checking ring gap, refer to PISTON RING GAP, CHECKING .
• Checking the piston ring groove clearance, refer to PISTON RING GROOVE CLEARANCE, CHECKING .

• 2 piece.
• Install the upper steel ring so the gap is offset by 120° to the neighboring compression ring.
• Offset all oil scraping ring component gaps to each other.
• Checking the ring gap, refer to PISTON RING GAP, CHECKING .
• Side clearance cannot be measured.

• Always replace as a set.
• Mark the affiliation to the cylinder -A-.
• Installed position: Marks -B- point to the belt pulley side.
• Separating a new connecting rod, refer to NEW CONNECTING ROD, SEPARATING .