check coolant light comes on on 1998 Jaguar XJ8

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
The check coolant light comes on even though there is coolant in radiator. The hose blew off but there was no water on engine surface. Took the radiator cap off and water blew out of fill hole. Now engine has a tap it sound.
(1) Answer
Get it checked by a Jaguar specialist, protect your investment.
If you want to find a Jag specialist, here's our directory link for you: