A3 L4-2.0L Turbo (BPY) (2006)
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Piston: Overhaul
Pistons and connecting rod, assembly overview
Pistons And Connecting Rod, Assembly Overview
1 - Connecting rod bolt
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Engine codes AXX, BPY, BWA 30 Nm plus an additional 90 ° (1/4 turn)
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Engine code BHZ 45 Nm plus and additional 90 ° (1/4 turn)
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Replace
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Lubricate threads and contact surface
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Use old bolt to measure radial play
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Tighten to 30 Nm to measure radial play, do not turn further
2 - Pressure relief valve
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27 Nm
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Opening pressure 1.6 to 1.9 bar
3 - Oil spray jet
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For piston cooling
4 - Connecting rod bearing cap
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Note installation position
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Due to the separation procedure (cracking) of the connecting rod, the cap only fits in one position and only to the corresponding connecting rod.
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Affiliation to cylinder mark - B
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Installed location: Markings - A - point to belt pulley side
5 - Bearing shells
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Upper bearing shell with oil hole for piston pin lubrication
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Installed location
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Do not interchange used bearing shells (mark)
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Axial play new: 0.10 to 0.35 mm Wear limit: 0.40 mm
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Measure radial clearance with Plastigage: New: 0.02 to 0.06 mm Wear limit: 0.09 mm. Do not turn crankshaft when checking radial clearance
