Dismantling and assembling parts of intake manifold: VW 1.9 SDI (AGP, AGR, ALH, AQM, …)
Step-by-step dismantling and assembling parts of intake manifold for the VW 1.9 SDI: factory workshop text.
Workshop procedure for VW — 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.
AGR ALH AQM ASV AYQ
Engine codes AGP, AQM
Engine codes AGR, ALH, ASV => Page
23-27
.
Engine code AYQ=>Page
23-30
.
Intake manifold - upper part
10 Nm
20 Nm
O ring
Renew
Intake manifold - lower part
Exhaust gas recirculation valve (mechanical)
Checking:
=> Repair group 26; Exhaust gas recirculation system
Direct injection and glow plug system with distributor pump
Exhaust gas recirculation system
Vacuum pipe
To EGR-valve (N18)
25 Nm
Gasket
Renew
From air cleaner
Connector
Black, 2-pin
For intake manifold flap change-over valve (N239)
Vacuum pipe
To non-return valve/vacuum pump branch piece
Air intake connecting piece
Only renew complete
With intake manifold flap change-over valve (N239) and intake manifold flap
Removing and installing
=> Page
23-32
Checking intake manifold flap change-over valve (N239)
=> Page
01-64
, Final control diagnosis
Checking intake manifold flap change-over => Page
23-98
Seal
Observe fitting position
Renew if damaged
Bracket
Engine codes AGR, ALH, ASV
Intake manifold
10 Nm
O ring
Renew
Vacuum pipe
To EGR valve (N18)
Air intake connecting piece
With exhaust gas recirculation valve and intake manifold flap
Checking intake manifold flap change-over => Page
23-98
Checking EGR valve:
=> Repair group 26; Exhaust gas recirculation system
Direct injection and glow plug system with distributor pump
Exhaust gas recirculation system
10 Nm
From charge air cooler
=> Repair group 21; Charge air system with turbocharger; Removing and installing parts of charge air cooling system
Direct injection and glow plug system with distributor pump
Charge air system with turbocharger
Removing and installing parts of charge air cooling system
Gasket
Renew
Connecting pipe
To exhaust manifold:
=> Repair group 26; Removing and installing parts of exhaust system
Direct injection and glow plug system with distributor pump
Removing and installing parts of exhaust system
25 Nm
Vacuum control element
Checking intake manifold flap change-over => Page
23-98
Intake manifold flap change-over valve (N239)
Checking => Page
23-102
Connector
Black, 2-pin
For intake manifold flap change-over valve (N239)
Vacuum pipe
To non-return valve/vacuum pump branch piece
Engine code AYQ
Intake manifold - upper part
10 Nm
15 Nm
O ring
Renew
Intake manifold - lower part
Exhaust gas recirculation valve (mechanical)
Checking:
=> Repair group 26; Exhaust gas recirculation system
Direct injection and glow plug system with distributor pump
Exhaust gas recirculation system
25 Nm
Gasket
Renew
20 Nm
To air cleaner
Intake manifold flap motor (V157)
Checking=>Page
23-107
Bracket
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 VW procedures
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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.