Passat Wagon L4-1781cc 1.8L Turbo (AEB) (1998)
Connecting Rod: Service and Repair
Pistons and conrods, disassembling and assembling
1. Piston ring
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Offset gaps by 120°
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Remove and install with piston ring pliers
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"TOP" faces towards piston crown
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Checking ring gap see Fig. 1
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Checking ring to groove clearance see Fig. 2
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2 or 3 part oil scraper ring, mixed installations permissible
2. Piston
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Checking see Fig. 3
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Mark installation position and cylinder number
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Arrow on piston crown points to pulley end
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Install using piston ring clamp
3. Conrad
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Only replace as a set
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Mark cylinder number -B-
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Installation position: Marking A- faces towards pulley end
4. Conrad bearing cap
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Note installation position
5. 30 Nm + 1/4 turn (90°) further
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Oil threads and contact surface
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To measure radial clearance tighten only to 30 Nm and no further
6. Pressure relief valve, 27 Nm
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Opening pressure: 2.5 to 3.2 bar
7. Oil spray jet
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For piston cooling
8. Bearing shell
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Note installation position
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Do not interchange used bearing shells
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Ensure retaining tabs fit tightly in recesses
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Axial clearance New: 0.05 and 0.31 mm, Wear limit: 0.37 mm