Removing and installing auxiliary heater Thermo Top V — VW

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

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

1. Remove front right wheel housing liner 66.
2. Remove front noise insulation 50.
3. Remove front bumper 63.
4. ⚠ Danger of burn injuries.Parts of the exhaust system may be hot.Before removing exhaust system, let it cool off. — Remove exhaust pipe from silencer on auxiliary heater .
5. ⚠ Risk of scalding.When the engine is warm, the coolant temperature may be above 100 °C. The cooling system is pressurised.If necessary, release pressure and reduce temperature before carrying out repairs. — Clamp off coolant hoses (2) using hose clamps up to 25 mm Ø3094 and pull coolant hoses off auxiliary heater.

6. Remove securing bolts (1) (8 ± 0.8 Nm) from washer fluid reservoir. — 0.8 Nm (0.6 lb-ft)
7. Remove securing bolt (1) (8 ± 0.8 Nm) below reservoir for windscreen washer system. — 0.8 Nm (0.6 lb-ft)
8. Pull windscreen washer reservoir out of guides (1) in direction of travel and set it aside.
9. ⚠ Danger of fuel escaping.Fuel system is under pressure.Before opening system, wrap a cloth around the connection. Then release pressure by carefully loosening the connection. — Disconnect fuel line at quick-release coupling and seal fuel lines with appropriate plugs.
10. ⚠ Auxiliary heater control unit J364 could be damaged.Overvoltage can occur at the connectors.First disconnect 8-pin connector. — Unplug the remaining connectors at the auxiliary heater.
11. Remove securing nuts (arrows) (15 ± 1.5 Nm) on right longitudinal member. — 1.5 Nm (1.1 lb-ft)
12. Remove securing nut (1) (8 ± 0.8 Nm) from auxiliary heater (2) on right longitudinal member (3). — 0.8 Nm (0.6 lb-ft)
13. Remove auxiliary heater from longitudinal member.
14. Remove securing nut (1) (15 ± 1.5 Nm) from auxiliary heater (2) on right longitudinal member (3). — 1.5 Nm (1.1 lb-ft)
15. Remove securing nut (1) (8 ± 0.8 Nm) from auxiliary heater (2) on right longitudinal member (3). — 0.8 Nm (0.6 lb-ft)
16. Remove auxiliary heater from longitudinal member. [Note: If the Thermo Top V is not to be renewed, connect vehicle diagnosis, testing and information systemVAS 5051A and call up the "“Release heater”" function under the guided functions.]
17. ⚠ When carrying out assembly work, particularly in the engine compartment due to the restricted space, observe the following points:Install all sorts of lines (e.g. for fuel, coolant and refrigerant) as well as electric wiring so that the original routing is restored.Make sure there is sufficient clearance between the lines and all moveable and hot components. — After installing auxiliary heater, bleed coolant circuit 19.
18. Then start the auxiliary heater.

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