Removing and installing coolant circulation pump before high-voltage heater (PTC)V509 — VW
Removing and installing coolant circulation pump before high-voltage heater (PTC)V509 on VW: 12 steps.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform code BE1
Don't miss
- Same installation procedure applies also for e-Golf models with heat pump. The illustrations show an e-Golf without heat pump.
- The markings on the coolant hoses must align with the markings on the coolant circulation pump before high-voltage heater (PTC)V509.
📋 Procedure
- Observe instructions when working on refrigerant circuit .
- Observe safety precautions when working in the vicinity of high-voltage components .
- Observe safety precautions Safety precautions when working on the cooling system.
- Observe the risk rating of the high-voltage system Electric drive00Risk category of the high-voltage system. [Note: Same installation procedure applies also for e-Golf models with heat pump. The illustrations show an e-Golf without heat pump.]
- Clamp off coolant hoses (1) and (8) with hose clamps up to 25 mm3094.
- Release clamps (2) and (7).
- Pull coolant hoses (1) and (8) off coolant circulation pump before high-voltage heater (PTC)V509(3).
- Separate connector (4).
- Remove bolt (5).
- Remove coolant circulation pump before high-voltage heater (PTC)V509(3) from bracket (6).
- The markings on the coolant hoses must align with the markings on the coolant circulation pump before high-voltage heater (PTC)V509.
- Replenish coolant circuit after coolant circulation pump before high-voltage heater (PTC)V509 has been installed Electric drive93Cooling system, vehicles with high-voltage system.
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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.