Can high level of bilirubin like 8 damage organ if it os present for a long time. time like 2 months ?

No: Usually the underlying cause of high bilirubin is the main concern. I don't know of any complication from the bilirubin itself, but there is usually other problems from the condition which is causing the high level. Good luck to the person who has this.

Probably not: A level of 8 indicated serious problem but is not high enough to cause damage to other organs. The underlying disease might though in certain cases, not hepatitis a.