mustang652 wrote:
Really hate to hear that you've blown an engine and more so, I hate to think what the price out on a new engine is going to run you. I too would like to know what mileage you had on it. I had an 8.1 just over 4 years ago, I got rid of a 2004 Tiffin 37DB with less than 25k on it because there was just something about the sound of that 8.1 and it's chronic tappet rattle I just did not like. I went back to and have stayed with the Ford V-10 and haven't looked back. I wish you the best of luck on the repair.
Since the 8.1L GM engine has hydraulic ROLLER lifters I doubt if you heard any tappet noise at all. What you MAY have had was a more common exhaust manifold gasket leak.
I know several 8.1L engines that are well over 100K miles, mine included in my coach.