Installing and removing lower part of intake manifold — AUDI
Installing and removing lower part of intake manifold on Audi: factory workshop procedure for engines AAR. Full factory text, tools and checks.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
🔧 Engine codes this applies to
📋 Procedure
Removing
Note:
All cable ties which are released or cut open when removing must be fitted in the same position when installing.
Remove the upper part of the intake manifold
=>Page
15-3
.
Unplug connector from cold start valve -arrow-.
Important
The fuel system is pressurised. Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
Unbolt fuel line.
Unplug connector -4-.
Detach hoses -1-, -2- and -5-.
Detach idling stabilisation valve bracket -3-.
Unscrew bolts -arrows-.
Remove retaining plates.
Remove injectors from lower part of intake manifold and set aside.
Note:
Protect the removed injectors from contamination.
Remove crankcase breather hose from intake cowl.
Detach air intake cowl.
Detach connector -arrow- from ACF valve.
Unclip ACF valve from bracket and tie back.
Detach connectors -1- and -2-.
Lay wiring aside.
Important
The fuel system is pressurised. Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
Disconnect fuel supply and return hoses from mixture control unit.
Release clips around air cleaner housing -arrows-.
Detach mixture control unit with upper section of air cleaner housing.
Detach and remove air intake connection -arrows-.
Detach hose -1- of intake air preheater from warm air arrester plate on exhaust manifold.
Remove the lower section of the air cleaner housing.
Unscrew warm air arrester plate -1...6-.
Unscrew CO test pipe -arrow-.
Unscrew lower part of intake manifold -1...6-.
Note:
Plug intake ports on cylinder head with clean cloths.
Installing
Install in reverse order.
Tightening torques
Component · Nm
Lower part of intake manifold to cylinder head · / 22
CO test pipe to exhaust manifold · 20
CO test pipe and earth wire to lower part of intake manifold · / 10
Warm air arrester plate to cylinder head · 25
Warm air arrester plate to exhaust manifold · 22
Retaining plates to lower part of intake manifold · / 10
Fuel line to cold start valve · 10
Fuel supply and return pipes · 23
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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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.