Ok so this is the tensioner that goes with the water pump. It's supposed to look like this:

And it now looks like this:


I've been to five parts stores, I've looked everywhere no where can give me a party name or number. Please help need to be to work Monday

 

For the V6:

 

I think this may be what your looking for:
Jaguar x Type Water Pump Belt Tensioner New C2S43295 | eBay

Says part # is C2S43295

 

Thank you both! I'm stuck up here and need to get it from a parts store since I can't wait. I mean if I have to I will. But if I can get it from advance auto parts, orileys auto parts, auto zone or Napa that would be ideal. Would anyone know if they'd have it? Is it jaguar specific part? Please and thank you if you could help me find it through one of them.

 

I have 2 used ones here off my parts cars. Best I can do is overnight it. Not sure of the cost. Best bet would be checking junk yards. Let me know I can have it shipped out 8am tomorrow. Just pm me your info