Just had the rear coolant cross over tube or whatever you call it crack and leak coolant I’m repairing the car and was wondering what psi should I pressure test the cooling system that way I can make sure that that was the only part leaking thanks for any help

 

Think the pressure is on the expansion tank cap - 14psi or so it will open at so any pressure up to say 10psi should be fine - but not all leaks show themselves cold.

 

While you are in there replacing this part you should consider upgrading/renewing the other problematic cooling system parts and tubes with this kit: https://euro-amp.com/products/jaguar...ipping-returns
Assuming you have the SC not NA engine that is.