Removing and installing regulating flap control unit J808 — VW
Removing and installing regulating flap control unit J808 on VW: 12 steps, engines CAVD, CGEA, CGFA, CJTA.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Touareg II (7P, 2010–2018)
- Opens: fuel
- Renewed: o-rings
Don't miss
- Loosen fasteners for fuel pipe (arrows). Do not disconnect fuel hoses.
📋 Procedure
- Pull back of engine cover panel (2) upwards and remove.
- Loosen fasteners for fuel pipe (arrows). Do not disconnect fuel hoses.
- Disconnect electrical connector (3) from regulating flap control unit J808.
- Remove bolts (5) and (6).
- Remove connecting pipe (1) with adapter (intermediate flange) (2) and regulating flap control unit J808(4). [Note: Renew O-rings.]
- Install connecting pipe (1) with adapter (intermediate flange) (2) and regulating flap control unit J808(4) together with new O-rings.
- Tighten bolts (5) and (6) hand-tight.
- Then first tighten bolts (arrows) to specified torque.
- Then tighten bolts (5) to same specified torque.
- Re-connect electrical connector (3).
- Tighten fuel pipe (arrows).
- If regulating flap control unit J808 has been renewed, adapt engine control unit "“Guided functions”".
Other VW procedures
- Removing and installing pistons
- Checking function and voltage supply (engine codes CAVA, CAVB, CAVC, CAVD)
- Checking holding pressure (engine codes CAVA, CAVB, CAVC, CAVD)
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- Removing and installing radiator, radiator fan V7 and radiator fan 2V177 (Sharan)
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
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.