Dismantling and assembling intake manifold — AUDI
Dismantling and assembling intake manifold on Audi: factory workshop procedure for engines AUA, BAG, BBY, BLF. Full factory text, tools and checks.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📐 44 workshop diagrams for AUA
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.
Dismantling and assembling intake manifold
WARNING
Fuel supply line is pressurised. Before loosening fuel connections always release fuel pressure prior to carrying out any work
Chapter
.
On engines with code letters BLP and BLF a fuel pressure limiting valve is incorporated in the fuel filter. In this system, only the supply pipe is routed to the front, to the engine compartment. The fuel pressure limiting valve opens when the pressure in the fuel supply line rises above 6 … 6.8 bar. Excess fuel flows from the filter directly back to the fuel tank via a return line.
Fuel return pipe
Not fitted on engines with code letters BLP and BLF
Blue or with blue marking
Secure with spring clips
Check that it is securely seated
To fuel delivery unit in fuel tank
Fuel supply pipe
Secure with spring clips
Check that it is securely seated
From fuel filter
Clip
Connecting pipe
The connecting pipe for fuel return line is not installed on engines with code letters BLP and BLF
Fuel pressure sender for low pressure
G410
Not fitted on models with engine code BLF
Fitting location: in fuel supply pipe
18 Nm
O-ring
Renew
Bolt
10 Nm
Banjo bolt
Only one banjo bolt on engines with code letters BLP and BLF
18 Nm
Throttle valve module
J338
After the
throttle valve module
J338
has been renewed, it must be adapted to the
Motronic control unit
J220
Vehicle diagnosis, testing and information system VAS 5051
Guided Fault Finding
Bolt
10 Nm
Clip
Hose from
activated charcoal filter system solenoid valve 1
N80
to intake manifold
Intake manifold
Removing and installing
Chapter
Seals
Renew
Bolt
8 Nm
Bolt
5 Nm
Connecting pipe
For exhaust gas recirculation system
Fuel pressure sender
G247
High-pressure pipe
Banjo bolt
18 Nm
Bolt
20 Nm
O-ring
Renew
Fuel rail (bottom section of intake manifold)
Before removing and installing, lock vacuum unit in position using a 2.5 mm drill
Chapter
.
Remove retaining clip (transport lock) on vacuum unit after installing new vacuum unit
After installation, check function of intake manifold flap (air flow control flaps) using
hand-operated vacuum pump
VAS 6213
Chapter
Renew seals and O-rings for injectors after removal
Gasket
Renew
Note installation position
Bolt
10 Nm
Intake manifold flap potentiometer
G336
Intake manifold flap = air flow control flaps
Bolt
1.5 Nm
Vacuum unit
Remove retaining clip (transport lock) on vacuum unit after installing new vacuum unit
After installation, check function of intake manifold flap (air flow control flaps) using
hand-operated vacuum pump
VAS 6213
Chapter
Bolt
20 Nm
Intake manifold pressure sender
G71
Bolt
5 Nm
Intake manifold flap valve
N316
Intake manifold flap = air flow control flaps
Vacuum hose
To vacuum unit
Bolt
20 Nm
Vacuum hose
From intake manifold
Hose to
activated charcoal filter solenoid valve 1
N80
Activated charcoal filter solenoid valve 1
N80
Fuel return pipe
Not fitted on engines with code letters BLP and BLF
Blue or with blue marking
Secure with spring clips
Check that it is securely seated
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.