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hissing sound from heating system

gazzibags Feb 24, 2009

  1. gazzibags

    gazzibags New Member

    hi just new member recently brought a8 2.8 .it making a hissing sound when temperature fan on also after you have turned engine off it carry's on for about 30 seconds you can also hear it if you pop the bonnet and listen at passenger side just in front of windscreen its a 1998 2.8 any help appreciated

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