Jetta Sedan L4-1.9L DSL Turbo (BEW) (2005)
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Open hose clamps - A - and disconnect coolant pipes from heater core.
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Remove heater core from heating and ventilation unit.
Installing:
Install in reverse order of removal, noting the following.
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Check seals - A - and - B - installed on heater core, only install a heater core with undamaged seals.
NOTE:
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An incorrectly glued seal can roll up into heating and ventilation unit when sliding in the heater core.
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If seal is damaged or installed incorrectly, cold air can flow past the heater core.
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With the heater core removed, check heating and ventilation unit for soiling (via heater core opening - A - ).
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If necessary remove dirt or coolant from heating and ventilation unit, for example after removing leaky heater core.
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Push heater core into the heating and ventilation unit.