Volkswagen Air Cooled 1949-1969 Repair Guide

Heat Exchangers

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REMOVAL & INSTALLATION





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Fig. Fig. 1 To remove the heater boxes, loosen the heater control flap cable retaining bolt ...



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Fig. Fig. 2 ... then slide the flap cable out of the retaining fixture



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Fig. Fig. 3 Remove the rubber heater hose clamps and slide the hoses off of the heater boxes



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Fig. Fig. 4 After disconnecting the heater boxes from the muffler, disconnect them from the cylinder head



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Fig. Fig. 5 Lower the heater box down and out of the engine compartment

To remove the heat exchangers, remove the exhaust pipe clamps, the clamps between the heat exchanger and the exhaust pipe, and the rear engine cover plate (type 1 and 2). Remove the nuts on the cylinder head and warm air pipe connecting clips. The heat exchanger can now be removed. Check the outer shell and exhaust pipes for damage and leakage. If the heat exchangers leak, there could be a possibility of poisonous gases entering the heating system. The sealing surfaces must be clean and smooth, and flanges that are distorted or bent through excessive tightening should be straightened or machined. Use new gaskets and ensure that all connections are gastight. Heat exchangers must be attached at the cylinder heads with self-locking 8mm nuts. It is not permissible for any other type of nut to be used, even with lockwashers.

 
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