Join Date: Oct 2006
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Thanks for all the comments.
I wondered about the seal and the tightness of the nut but was worried about tightening this for exactly the reasons given.
I could hear air leaking from the valve when I took a close look. Giving the 'stem' a tap seemed to stop this.
I'll try WD40 and post back. Does seem more than a coincidence that this started with the cold weather.
Currently in Eeeps's garage:
2011 Clio III dCi 88 Dynamique and 2016 CitroŽn Grand C4 Picasso Exclusive+ EAT6 2.0 BlueHDi