Removing and installing natural gas tank 5, Caddy Maxi — VW
Removing and installing natural gas tank 5, Caddy Maxi on VW: factory workshop procedure for engines BCA, BGU, BSE, BSF.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📐 57 workshop diagrams for BCA
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.
Removing and installing natural gas tank 5, Caddy Maxi
Special tools and workshop equipment required
Engine and gearbox jack
V.A.G 1383 A
Torque wrench
V.A.G 1331
Bracket
T10351
Removing
WARNING
Release pressure in the system before working on the natural gas system.
Vehicle diagnostic tester
Connecting and carrying out Guided Function
“Releasing pressure in the natural gas high-pressure line”
.
Note
Observe safety precautions when working on natural gas system
Chapter
.
Observe rules for cleanliness
Chapter
.
Remove protective covers on underbody:
Caddy
Chapter
Caddy Maxi
Chapter
Close mechanical shut-off valve
2
on all natural gas tanks.
Note
The handwheels for mechanical shut-off valves have been discontinued.
Close the mechanical shut-off valves using a commercially available spanner.
Separate connectors
1
from tank shut-off valve on all natural gas tanks.
Carefully loosen unions of high-pressure lines
arrows
to allow remaining gas to leak out.
Remove high-pressure lines from tank shut-off valve.
Place
engine and gearbox jack
V.A.G 1383 A
with
bracket
T 10351
under tank to support it.
Loosen securing straps
arrows
.
Secure natural gas tank
2
on
engine and gearbox jack
V.A.G 1383 A
1
with securing straps.
Slowly lower
engine and gearbox jack
V.A.G 1383 A
.
If natural gas tank or tank shut-off valve is to be exchanged, empty natural gas tank
Chapter
.
Installing
Install natural gas tank mounting
arrow A
.
Check inner sides of securing straps for soiling
arrow B
, clean as required.
Place natural gas tank
1
in mountings
arrow
.
Hook securing strap locking devices in position
arrow
and move natural gas tank to installation position
Chapter
Assembly overview.
Tighten bolt
1
to specified torque of 15 Nm.
Once high-pressure lines are installed, open mechanical shut-off on tank shut-off valve.
Then a leak test must performed by a technical expert
Chapter
.
Further installation is carried out in the reverse order.
Specified torque
Component
Specified torque
Securing bolt of securing strap
15 Nm
High-pressure line to tank valve union (counterhold on union with a spanner)
First tighten hand-tight then turn 90° (1/4 turn) further
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.