A4 Quattro Sedan L4-1.8L Turbo (AWM) (2001)
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Piston: Service and Repair
Piston and connecting rods, disassembling and assembling
Note: Oil spray jet and pressure relief valve Refer to, Fig. 6
1. Connecting Rod bolt - 30 Nm + 1/4 turn (90°) further
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Always replace
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Oil threads and contact surface
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To measure radial clearance use old bolt
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To measure radial clearance tighten to 30 Nm but not further
2. Connecting Rod bolt bearing cap
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Mark cylinder number -B-
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Installation position: Markings -A- face towards pulley side
3. Bearing shells
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Upper bearing shell with oil bore for piston bolt lubrication
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Installation position Refer to, Fig. 5
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Do not interchange used bearing shells (mark).
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Axial clearance New: 0.10 to 0.35 mm, Wear limit: 0.40 mm
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Check radial clearance with Plastigage: New: 0.01 to 0.05 mm, Wear limit: 0.12 mm. Do not rotate crankshaft when checking radial clearance
4. Connecting Rod bolt
Only replace as a set
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Mark cylinder number -B-
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Installation position: Markings -A- face toward pulley side
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With oil bore for piston pin lubrication
5. Circlip
