volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Separating new conrod > < Dismantling and assembling pistons and conrods
Assembly overview - pistons and conrods
   
Assembly overview - pistons and conrods
1 - Piston rings
q   Offset gaps by 120°
q   Remove and install using piston ring pliers.
q   “TOP” faces towards piston crown.
q   Checking ring gap → Fig..
q   Checking ring-to-groove clearance → Fig..
2 - Piston
q   Checking → Fig..
q   Mark installation position and cylinder number.
q   Arrow on piston crown points to pulley end.
q   Install using piston ring clamp.
3 - Piston pin
q   If difficult to remove, heat piston to 60 °C.
q   Remove and install with VW 222a.
4 - Circlip
5 - Conrod
q   Renew as set only.
q   Mark cylinder number -B-.
q   Installation position: marking -A- faces towards pulley end.
6 - Bearing shell
q   Note installation position → Chapter.
q   Do not interchange used bearing shells.
q   Insert bearing shells centrally.
q   Axial clearance new: 0.05…0.31 mm , wear limit: 0.37 mm
q   Measure radial clearance using Plastigage; new: 0.01…0.06 mm; wear limit: 0.09 mm. Do not rotate crankshaft when measuring radial clearance.
7 - Cylinder block
q   Checking cylinder bores → Fig..
q   Piston and cylinder dimensions → Chapter.
8 - Conrod bearing cap
q   Note installation position.
q   Due to the conrod, which is separated using the cracking process, the conrod bearing cap only fits in one position.
9 - Conrod bolt, 30 Nm + 90° further
q   Torx E 10
q   Renew.
q   Oil threads and contact surface.
q   To measure radial clearance, tighten to 30 Nm but not further.

   

Separating new conrod > < Dismantling and assembling pistons and conrods