Pistons And Connecting Rod Overview
WARNING: This page is about a different variant/trim than selected.
- Bolt
- 30 Nm + 90° (1/4) additional turn.
- Always replace.
- Lubricate the threads and contact surface.
- Tighten to 30 Nm to measure the radial play, do not tighten the additional torque.
- Bolt with Pressure Relief Valve
- 27 Nm
- Opening pressure 1.3 to 1.6 bar pressure.
- Oil Spray Jet
- For the piston cooling.
- Connecting Rod Bearing Cap
- Pay attention to the installed position
- Due to the separation procedure (cracking) of the connecting rod, the cap only fits in one position and only to the corresponding connecting rod.
- -B- is the affiliation to the cylinder mark.
- Installed position: Marks -A- point to the belt pulley side.
- Bearing Shell
- Note the installed position, refer to BEARING SHELL, INSTALLED POSITION .
- Do not interchange used bearing shells.
- Axial play new: 0.10 to 0.35 mm wear limit: 0.4 mm.
- Measure radial clearance using Plastigage: New: 0.02 to 0.06 mm wear limit: 0.09 mm. Do not rotate the crankshaft when checking the radial clearance.
- Connecting Rod
- With a cracked bearing cap.
- Only replace as a set.
- -B- is the affiliation to the cylinder mark.
- Installed position: Marks -A- point to the belt pulley side.
- Circlip
- Piston Pin
- If difficult to move, heat the piston to 60°C (140°F).
- Remove and install using a pilot drift VW 222 A.
- Piston
- Checking, refer to Figure.
- Mark the installed position and cylinder allocation.
- Arrow on the piston face points toward the belt pulley side.
- Install with piston ring compressor.
- Cylinder bore, checking. Refer to Figure.
- For the correct piston and cylinder dimensions, refer to PISTON AND CYLINDER DIMENSIONS .
- Piston Rings