Join Date: Jun 2012
Location: Kilmarnock, Ayrshire. UK
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Strange noise from engine bay
3.0 TDi Engine.
Last night I noticed a noise from the engine bay, the engine was not running and hadn't been running all day. I had just checked the oil ( via dipstick ) and when I closed the bonnet I could hear a quiet, high pitched squeal.
The sound was the same noise that you get if you take a cordless drill and squeeze the trigger very gently until the motor just begins to turn, there will be a squeal from the speed control electronics.
So I opened up again and prodded around, right at the back, in the centre, half under the top cover there is what looks like a motor connected to a pushrod, if I touched this the frequency changed.
Each time I opened the drivers door this noise would start, continue for maybe 20 seconds and then would terminate with a "splutch" noise, like pressure being released on a liquid.
Presumably something is cycling every time I open the door? I'm wondering what it could be! Has anyone noticed something like this or know what it is?