Vauxhall Astra H Estate - Astra 1.3 cdti strange humming on switching off

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Tue 6 Jul 2010 21:58
Vauxhall Astra H Estate - Astra 1.3 cdti strange humming on switching off - mikejharvey

My Astra 1.3 cdti (Fiat engine) has started making a strange vibration / humming noise when I switch the engine off once thoroughly warm. The noise persists for 10 seconds or so after the engine has stopped, and it comes from a small component situated under the offside front chassis leg, just forward of the front subframe mounting, more or less under the headlamp, but back a little. The component is mounted on rubber bobbins, and has a wiring loom plug attached. Have any of you guys any idea what it is and what it does, and is it potentially serious? I'd be very grateful. Cheers

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Tue 6 Jul 2010 22:12
Vauxhall Astra H Estate - Astra 1.3 cdti strange humming on switching off - Collos25

Is it something to do with the electric steering set up I have heard of these units burning out on Puntos.

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Tue 6 Jul 2010 22:45
Vauxhall Astra H Estate - Astra 1.3 cdti strange humming on switching off - mikejharvey
I don't think so Andy, but who knows! Mine has a hydraulic reservoir on the n/s of the car almost on the end of the rack, down behind the engine and I think it's probably electro hydraulic. Strangely enough though, the power steering can sometime stake 8-12 seconds to come on even when the engine is running. I complained when it was still under warranty, (it's a 2007) and they have just made a note in case it develops.
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