Intake manifold (bottom section), fuel rail and injectors - exploded view — AUDI
Intake manifold (bottom section), fuel rail and injectors - exploded view on Audi: factory workshop procedure for engines BUH, BUJ, CEPA, CEPB.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.
Intake manifold (bottom section), fuel rail and injectors - exploded view
Note
The illustration shows the intake manifold (bottom section) for cylinder bank 2 (left-side).
Seals
Renew
Intake manifold (bottom section)
With vacuum unit for intake manifold flaps
Removing and installing
Chapter
After renewing, check vacuum system for leaks
Chapter
Bolt
2.5 Nm
Intake manifold flap potentiometer
Cylinder bank 1 (right-side):
intake manifold flap potentiometer
G336
Cylinder bank 2 (left-side):
intake manifold flap potentiometer 2
G512
After renewing, perform
“Adaption”
in
“Guided Functions”
Seal
Renew if damaged
When renewing lever out with screwdriver
Press in by hand
Vacuum hose
From
intake manifold flap valve
N316
Fuel rail
Removing and installing
Chapter
Threaded connection
40 Nm
High-pressure pipe
Reducing fuel pressure in high-pressure section of injection system
Chapter
Connections must not be damaged
Do not alter shape
Removing and installing
Chapter
Lubricate thread lightly with engine oil
25 Nm
Sleeve
Bolt
Tightening torque and sequence
Fig.
Nut
Tightening torque and sequence
Fig.
Retaining clip
For fuel rail
Bolt
2.5 Nm
Bolt
9 Nm
Bracket
Bolt
Renew
7 Nm + turn 90° further
Fuel pressure sender
Cylinder bank 1 (right-side):
fuel pressure sender
G247
Cylinder bank 2 (left-side):
fuel pressure sender 2
G624
Removing and installing
Chapter
25 Nm
Support ring
Renew
Via this support ring, the fuel rail exerts the clamping force that holds the injector in the cylinder head
Clipped to radial compensation element
item 24
O-ring
Renew
Lubricate lightly with clean engine oil
Spacer ring
Renew if damaged
Injector
Removing and installing
Chapter
Combustion chamber ring seal
Do not apply grease or use any other lubricants
Renewing
Chapter
“
Removing and installing injectors
”
Radial compensation element or sealing element
Renew if damaged
Version 1 injector: clip radial compensation element onto support ring
item 19
Version 2 injector: sealing element
Intake manifold (bottom section) - tightening torque and sequence
Tighten bolts and nuts
arrows
for intake manifold (bottom section) in stages and in diagonal sequence; final torque 9 Nm.
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.
Ask about my car →Other AUDI procedures
- Removing and installing thermostat housing – Audi TT Mk1
- Removing and installing intake manifold (bottom section) with fuel rail · 1 torque figures
- Removing and installing high-pressure pipe – Audi A8 D4 · 1 torque figures
- Removing and installing intake manifold (top section) – Audi
- Removing and installing fuel pump control unit J538 - vehicles with FSI engine from 06.2004 onwards
- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 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.