Removing and installing coolant circulation pump before high voltage PTC heater V509 — VW
Removing and installing coolant circulation pump before high voltage PTC heater V509 on VW: 7 steps, 1 torque figure.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Golf VI (5K, 2008–2013), VW Golf Cabriolet (517, 2011–2016)
Don't miss
- Observe general warning instructions for work on high voltage system .
- After installing coolant circulation pump before high voltage PTC heater V509, bleed coolant circuit. Information about bleeding the coolant circuit is available from the E-field service team.
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 0.8 Nm (0.6 lb-ft) | Unscrew bolts (3 |
ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.
📋 Procedure
- Observe general warning instructions for work on high voltage system (see the separate procedure).
- Clamp off coolant hoses using hose clamps up to 25 mm 3094.
- Loosen clip (4).
- Pull off coolant hoses from coolant circulation pump before high voltage PTC heater V509(1).
- Separate wiring connector (2) from coolant circulation pump before high voltage PTC heater V509(1).
- Unscrew bolts (3) (8 ± 0.8 Nm) and remove coolant circulation pump before high voltage PTC heater V509(1). — 0.8 Nm (0.6 lb-ft)
- After installing coolant circulation pump before high voltage PTC heater V509, bleed coolant circuit. Information about bleeding the coolant circuit is available from the E-field service team.
Other VW procedures
- 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
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- Emptying fuel tank if more than 3/4 full, CBTA, CBUA
- Removing and installing activated charcoal filter, engine codes CBTA, CBUA
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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 → · How these pages are made →Workshop data on this page last updated 20 Sep 2026.