Assembly overview - belt drive — VW
Assembly overview - belt drive on VW: factory workshop procedure for engines BLG, BMY, CAVA, CAVD. Full factory text, tools and checks.
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.
Assembly overview - belt drive
Note
The belt drive differs depending on the gearbox.
Two tensioning elements (items 8 and 16) are installed in vehicles with dual clutch gearbox; a guide roller (item 18) and a tensioning element (item 16) is installed in vehicles with manual gearbox.
40 Nm + 90° (
1
/
4
turn) further
To loosen and tighten securing bolt, counterhold supercharger shaft with 16 mm spanner.
Renew.
Pulley
For supercharger.
23 Nm
Tensioning element
For supercharger poly V-belt
Relieve tension using 16 mm spanner.
Lock with
locking pin
T10060 A
.
8 Nm
Coolant pump with
magnetic clutch for supercharger
N421
Removing and installing
Chapter
Removing and installing coolant pump pulley
Chapter
.
23 Nm
Tensioning element
For poly V-belt.
Relieve tension using
16 mm open-end spanner
T10241
.
Lock with
locking pin
T10060 A
.
Note
Vehicles with a manual gearbox: idler roller installed instead of tensioning element.
Specified torque for securing bolt: 40 Nm.
23 Nm
Alternator
Pulley
For crankshaft.
With diamond coated washer
Contact surfaces must be free of oil and grease.
Securing bolt
Removing and installing crankshaft pulley
Chapter
.
Renew.
Contact surface for securing bolt must be free of oil and grease.
Oil threads before inserting.
Secure belt pulley against turning with
counterhold
3415
Turning further can be done in several stages.
The turning further angle can be measured using a commercial protractor e.g. Hazet 6690.
40 Nm + 90° (
1
/
4
turn) further
Removing and installing from below.
Renew.
Air conditioner compressor
23 Nm
Tensioning element
For poly V-belt.
Relieve tension with spanner.
Lock with 4 mm Allen key.
Poly V-belt
Mark direction of rotation before removing.
Caution
When installing poly V-belt, observe direction of rotation and make sure it is properly seated on pulleys and tensioning elements.
Removing and installing
Chapter
Idler roller
With bolt.
40 Nm
Poly V-belt
For supercharger.
Mark direction of rotation before removing.
Caution
When installing poly V-belt, observe direction of rotation and make sure it is properly seated on pulleys and tensioning elements.
When removing, relieve tension of tensioning element using a spanner and lock with
pin
T10060 A
.
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
- Removing and installing valve timing housing (timing case)
- Emptying fuel tank if it is less than 3/4 full · 1 torque figures
- Removing and installing crankshaft pulley · 2 torque figures
- Separating and joining front and rear silencers · 3 torque figures
- Removing and installing anti-theft engine control unit J623 (Golf)
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 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.