11 grand is alot of money for an engine but I would have to agree with the decision the Dealership/Honda Australia has decided. Anything you do that has a direct effect on the damaged item would void the warranty. Warranty only covers defects in manufacturing and workman ship. I think you should stop bagging Honda as you are clearly at fault and your story is very one sided. Look around and see how many fd civics there are on the road, yet its only your motor thats blown. It has to tell you something.