hi guys,can enyone talk me through step by step on how to change the thermostat housing tower as ime about to change over from plastic to aluminium or if someone can give me a link to a vid of the process would be great,thanks

 

No video, but Gus' repair site has a good pictorial.

JagRepair.com - Jaguar Repair Information Resource

The back bolts are a PITA. A good crows foot wrench will work or you can break off the plastic body allowing access to the bolts. Watch where those pieces go.