Jaguar Repair Problems? Ask a Jaguar Repairs Expert.
Sounds like it may be one of the idler pulleys on the engine. I recommend we remove the belt and spin all of them to see if any make noise or are rough to spin. We can also start the engine without the belt to see if the noise is still there. Let me know.
Did you replace all the idlers? Does the noise go away if you run the engine with no belt?
Yes it does sound like it is from that area. Obviously that is not a factory setup but I think we should remove the belt and make sure the noise is still there.