Removing and installing coolant pipes at heat exchanger (Denso) — VW
Removing and installing coolant pipes at heat exchanger (Denso) on VW: 17 steps. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Golf VII Variant (BA), VW Golf VII (5G, 2012–2020)
Don't miss
- Check screw-type clips (2) for proper seating on connections of heat exchanger and check coolant pipes. The coolant pipes must not rest against air distribution housing or any other components.
📋 Procedure
- Remove heater and air conditioner unit .
- Detach the sealing collar (3) to the plenum chamber bulkhead.
- Remove bolt (2).
- Detach the coolant pipe holder (4) to the left.
- Detach the foam (1).
- Screw out the bolts (5) and detach the screw-type clamps (6).
- Pull coolant pipes (7) and (8) off heat exchanger.
- Check connection (3) of the heat exchanger and the connection of the coolant pipes (1) for damage or dirt.
- Clean and smoothen sealing surface for seals.
- Moisten new seals (2) with coolant (or lubricate lightly with silicone grease) and fit them to coolant pipe (1).
- Push coolant pipes into heat exchanger as far as stop.
- Fit new screw-type clamps (2) at the coolant pipe/heat exchanger joint.
- Tighten bolt (1).
- Check screw-type clips (2) for proper seating on connections of heat exchanger and check coolant pipes. The coolant pipes must not rest against air distribution housing or any other components.
- Install heater and air conditioning unit .
- Read event memory, and clear any entries displayed vehicle diagnostic tester in "“Guided fault finding”" mode.
- As a final step, check operation of heater and air conditioning system.
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
- Checking the Intake System for Leaks (Unmetered Air) – VW 2.3
- Servicing the Ignition Unit – VW 2.3 AGL
- Servicing rear drive shaft
- Replacing injection pump throttle lever return spring – VW AAB
- Checking injectors for break-off pressure and for leakage
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.