I don't know much about the lifter issue as our '08 has been pretty good but it always amazes me that when manufacturer's get things right they go ahead and mess with them and make problems. It seems to be across the board with manufacturers. After Jeep went to a new major owners group, to be left unnamed, we had a (our last) Grand Cherokee that needed new differentials every 10,000 miles because of the "new" carrier design implemented by the new company. That was after we owned three previous Grand Cherokees that were without issue. "If it ain't broke, break it" just because some factory Engineer convinces the bosses that he has an idea that might justify his existence. And I write that as a retired Engineer. I sympathise with those with the engine problem; It has to be heartbreaking to buy a new vehicle that costs more than it did to build my house and have this happen.