Exploded view - refrigerant lines, expansion valve, internal heat exchanger — AUDI
Exploded view - refrigerant lines, expansion valve, internal heat exchanger on Audi: factory workshop procedure. Full factory text, tools and checks.
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.
Exploded view - refrigerant lines, expansion valve, internal heat exchanger
Caution
Danger from the escape of pressurised refrigerant.
Frostbite on the skin and other parts of the body.
Only unfasten the screws on the joints after discharging the refrigerant circuit.
Refrigerant line with internal heat exchanger
The hot liquid refrigerant flowing on the high-pressure side supplies energy to the cold refrigerant vapour flowing on the low-pressure side, thus enhancing the efficiency of the air conditioner
Removing and installing
Chapter
“
Detaching refrigerant lines in area of A-pillar from refrigerant line with internal heat exchanger
”
Chapter
“
Removing and installing refrigerant line with internal heat exchanger
”
Refrigerant line - high-pressure side
From condenser
Detaching and attaching refrigerant line
Chapter
“
Detaching refrigerant lines from front expansion valve/re-attaching
”
and
Chapter
“
Detaching and attaching refrigerant lines at quick-release couplings
”
Union nut
16.5 Nm
O-ring
Renew
Chapter
; for correct version refer to
Electronic parts catalogue
Before installing, lubricate lightly with refrigerant oil
Refrigerant shut-off valve 1 for hybrid battery
N516
Only vehicles with high-voltage system
Chapter
“
Removing and installing
refrigerant shut-off valve 1 for hybrid battery
N516
”
O-ring
Renew
Chapter
; for correct version refer to
Electronic parts catalogue
Before installing, lubricate lightly with refrigerant oil
Union nut
16.5 Nm
Refrigerant line - high-pressure side
with service connection on high-pressure side
To expansion valve
Removing and installing
Chapter
“
Detaching refrigerant lines from front expansion valve/re-attaching
”
Removing and installing purge valve and filling value
Chapter
Bolt
10 Nm
Bolt
10 Nm
Bolt
2x
10 Nm
O-ring
Renew
Chapter
; for correct version refer to
Electronic parts catalogue
Before installing, lubricate lightly with refrigerant oil
Expansion valve
Different versions
Electronic parts catalogue
Detaching and attaching refrigerant line
Chapter
“
Detaching refrigerant lines from front expansion valve/re-attaching
”
Removing and installing
Chapter
“
Removing and installing expansion valve (front)
”
O-ring
Renew
Chapter
; for correct version refer to
Electronic parts catalogue
Before installing, lubricate lightly with refrigerant oil
Refrigerant line - low-pressure side
with service connection on low-pressure side
From expansion valve
Removing and installing
Chapter
“
Detaching refrigerant lines from front expansion valve/re-attaching
”
Removing and installing purge valve and filling value
Chapter
Grommet
O-ring
Renew
Chapter
; for correct version refer to
Electronic parts catalogue
Before installing, lubricate lightly with refrigerant oil
Refrigerant line - low-pressure side
Exploded view
Chapter
Bolt
Tightening torque
Chapter
Refrigerant line - high-pressure side
Exploded view
Chapter
Bolt
Tightening torque
Chapter
O-ring
Renew
Chapter
; for correct version refer to
Electronic parts catalogue
Before installing, lubricate lightly with refrigerant oil
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.