[Tpabayflyer]

I know this is an older thread but I recently got a good deal on a 2010 6.1 with the Hemi tick…. #5 cyl was the culprit with BOTH lifters bad…. I believe the exhaust(3rd from the back?) was toast with the roller flat spotted and the plunger retainer had popped out? The other lifter was still barely operational as it had a ton of play in the needle bearings and the roller had a ton of clearance….. all the rest of the lifters were like new. Engine was just recently rebuilt I was told and I believe it as it’s super clean and no hardly any carbon deposits….. cyl #5 was super clean……. I’m putting in a Comp 220/230 HRT cam/springs and I’m going to measure exact pushrod length and get custom pushrods for extra insurance against failure……. And of course I have new hellcat lifters going in……. I know this info is old but it may help someone…….

 

[Tpabayflyer]

Ok, I’m getting my 6.1 back together with new cam, new Mopar lifters, and new HV oil pump… #5 cyl had a total failure of one lifter roller and the other one next to it was still spinning but it had waaay to much play in the needle bearings so it was on the way out…. All the other lifters looked excellent….. I bought this car with a bad tick of course and the price was right for someone like me who can do the work….. I’m also going to get custom pushrods as I did get my heads shaved a little and using a .040 thick head gasket and this allows me to get perfect preload. I also think that the redesign of the roller bearings in the lifters to a larger size will solve these issues hopefully…. I bet their was some bad metal used in the previous design and let a dollars worth of **** metal ruin thousands of good engines…. I also have an 09 Gr Cherokee 5.7 that’s over 150K miles and it runs great…. I bought it new and put a tune on it and deleted the MDS…. Regular oil changes and it’s been good……. I wonder if I could send some of the failed needle bearings out some where and have them Rockwell tested for hardness?