2004 Jaguar XJ6

Noises problem
2004 Jaguar XJ6 6 cyl Two Wheel Drive Automatic 54000 miles

I have a rattling noise from underneath my car it feels as though its from the middle section. Ive had it in twice for repair, they say its the heat deflector plate for the exhaust. They say it just clips on in some fashion but thats twice its been fixed and the rattle is back again. Is there any way of welding the plate permanently or some other fixture.

June 9, 2010.

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