volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

High Pressure Safety Valve HVAC > < Heater Core|Service and Repair|Page 10415
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Check position of grommet -C- in bulkhead for proper seating.

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Seal flange for coolant pipes to heater core -A- and for expansion valve (to evaporator, only in vehicles with A/C system) -B- at grommet
pass-through -C- with silicon adhesive sealant if necessary (to prevent water from penetrating).

NOTE: 

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Sealing rings must always be replaced.

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After replacing heater core, coolant must be replaced completely (refer to applicable engine).

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Check coolant circuit for leaks, pay particular attention between coolant hoses and heater core.

High Pressure Safety Valve HVAC > < Heater Core|Service and Repair|Page 10415