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Re: Clio Mk2 1.5dCi noisy engine
A loud squeal first thing is 90% the belt driving the alternator (fan belt in my generation - aux belt to you young-uns). After starting the load on the alternator is higher than normal, and the belt will slip (and squeal) until the charging current drops and the belt can handle the load on the pulley. Check this first.
If the squeal doesn't go away, look at the bearings or idler pulleys.
I always wanted to be somebody, but now I realize I should have been more specific (Lily Tomlin)
Currently in twodogs's garage:
2011 Grand Scenic III 1.5dci EDC; Royal Enfield 350 Bullet; Boxes of tools and spare parts I will never need again.