Funny noise when I turn engine off

2011 Vauxhall Insignia 2.0 turbo diesel
Car: Vauxhall Insignia
Year: 2011
Variant: 2.0 turbo diesel
Categories: Leaks & Noises
When I turn the engine off above the radiator is a small unit with three pipes two rubber one metal it go's tick tick tick then it sounds like a ships horn sort ov noise I think it may hav something to do with aircon any know wats up would like to know thanks
Problem added: Jun 25, 2012 (11 years ago)
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