Piston and connecting rod, disassembling and assembling: Notes
1 - Piston rings
- Offset gaps by 120 °
- Use piston ring pliers to remove and install
- "TOP" faces towards piston crown
- Checking ring gap Checking piston ring gap
- Checking ring to groove clearance Checking ring to groove clearance under Piston and connecting rod, disassembling and assembling
2 - Piston
- Checking Checking piston under Piston and connecting rod, disassembling and assembling
- Mark installation position to connecting rod and cylinder
- Flatter side of piston crown faces toward center of cylinder block
- Install with piston installation tool Funnel 3278 Installing pistons with piston installation tool under Piston and connecting rod, disassembling and assembling
3 - Snap ring
4 - Conrod
- Only replace as a set
- Mark position to cylinder - B -
- Installation position: Marks - A - must be aligned above one another
5 - Bearing shell
- Observe installation position
- Do not interchange used bearing shells
- Lugs on bearing shells must fit tightly in recesses
- Axial clearance, New: 0.05...0.35 mm, Wear limit: 0.40 mm
- Check radial clearance with Plastigage: New: 0.02...0.07 mm, Wear limit: 0.10 mm. Do not turn crankshaft when checking radial clearance
6 - Conrod bearing cap
- Mark position to cylinder - B -
- Installation position: Marks - A - must be aligned above one another
7 - 30 Nm plus additional 1 / 4 turn (90 ° ) further
- Replace
- Oil thread and contact surface
- To measure radial clearance tighten to 30 Nm, but do not turn further
8 - Cylinder block
- Checking cylinder bore Checking cylinder bores under Piston and connecting rod, disassembling and assembling
- Removing and installing crankshaft → Crankshaft, removing and installing
- Piston and cylinder dimensions → Piston and cylinder dimensions
9 - Piston pin
- If difficult to remove, heat piston to 60 ° C
- Remove and install with drift VW 222a