Installing lower sump: VW Passat B5 4.0 (BDN, BDP)
Step-by-step installing lower sump for the VW Passat B5 4.0 (BDN/BDP): 5 steps, 2 torque figures. What to remove, what to tighten and to how many Nm, what.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Passat B5 (3B)
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- Cut off tube nozzle of silicone sealantD 176 404 A2 at forward marking (∅ of nozzle approx. 3 mm).
- The sealant bead must not be thicker, otherwise excess sealant will enter the oil sump and may block the oil suction line strainer.
- Let sealing compound dry for approx. 30 minutes after installing sump. Only then fill with engine oil.
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 8 Nm (5.9 lb-ft) | Tighten coolant and refrigerant line retainers on upper sump |
| 8 Nm (5.9 lb-ft) | Tighten oil sump bolts |
ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.
📐 6 workshop diagrams for BDN
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- Cut off tube nozzle of silicone sealantD 176 404 A2 at forward marking (∅ of nozzle approx. 3 mm).
- Apply sealant, as shown, to clean sump sealing surface. Sealant bead must be: [Note: The sealant bead must not be thicker, otherwise excess sealant will enter the oil sump and may block the oil suction line strainer.]
- Install sump immediately and tighten all sump bolts lightly.
- Tighten oil sump bolts to 8 Nm. — 8 Nm (5.9 lb-ft)
- Tighten coolant and refrigerant line retainers on upper sump to 8 Nm. [Note: Let sealing compound dry for approx. 30 minutes after installing sump. Only then fill with engine oil.] — 8 Nm (5.9 lb-ft)
Ask TorqFix about your VW BDN — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.
Ask about your VW BDN — free → or sign up free to see the drawingsOther VW procedures
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.