A4 Quattro Sedan L4-2.0L Turbo (CAEB) (2009)
‹› Installed location => [ Installed position of bearing shell ]
‹› Do not interchange used bearing shells (mark)
‹› Axial play new: 0.10 to 0.35 mm Wear limit: 0.40 mm
‹› Measure radial clearance with Plastigage(R): New: 0.02 to 0.06 mm Wear limit: 0.09 mm. Do not turn crankshaft when checking radial
clearance
4
Pressure relief valve
‹› 27 Nm
5
Oil spray jet
‹› For piston cooling
6
Circlip
7
Piston pin
‹› If tight, heat piston to 60 °C
‹› Removing and installing using a Pilot Drift (VW 222 A)
8
Piston
‹› Checking, refer to => [ Pistons, Checking ] See: Piston/Testing and Inspection
‹› Mark installed position and cylinder allocation
‹› Arrow on piston face points toward belt pulley side
‹› Install with piston ring compressor
‹› Piston and cylinder dimensions, refer to => [ Piston and Cylinder Dimensions ] See: Piston/Specifications
‹› Cylinder bore, checking, refer to => [ Cylinder Bore, Checking ] See: Testing and Inspection
9
Compression rings
‹› Offset gaps by 120°
‹› Use piston ring pliers for removal and installation
‹› The "TOP" or "R" marking must face toward the piston crown.
‹› Checking ring gap, refer to => [ Piston Ring Gap, Checking ] See: Piston Ring/Testing and Inspection/Piston Ring Gap, Checking
‹› Check piston ring groove clearance, refer to => [ Piston Ring Groove Clearance, Checking ] See: Piston Ring/Testing and Inspection/Piston
Ring Groove Clearance, Checking
10
Oil scraping ring
‹› 2-part
‹› Install upper steel ring so gap is offset by 120° to neighboring compression ring
‹› The "TOP" or "R" marking must face toward the piston crown.
‹› Offset all oil scraping ring component gaps to each other.
‹› Checking ring gap, refer to => [ Piston Ring Gap, Checking ] See: Piston Ring/Testing and Inspection/Piston Ring Gap, Checking
‹› Side clearance cannot be measured.