volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

High Pressure Safety Valve HVAC > < Heater Core|Service and Repair|Page 4890
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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).

‹› Sealing rings must always be replaced.

‹› If hose clamps are deformed, replace them.

‹› After replacing heater core, coolant must be replaced completely

‹› 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 4890