Dr. Righteous
Senior Member
- Joined
- May 13, 2016
- Posts
- 432
- Reaction score
- 468
- Location
- Jamestown TN
- Ram Year
- 2014
- Engine
- 5.7 hemi
It’s a QC issue IMO. Otherwise they would all fail at a similar lifetime. Not disagreeing that rollers are a demanding design, but anything mechanical has a finite design life for a particular percentage to survive a designated amount of usage. You can design for a 100k or a million. And you can hold your suppliers to a certain amount of deviation. I don’t think I’d be happy with the performance of an engine built to a million mile half life personally. Nor do I really need it to outlast the body. But when you have too many outliers experiencing that type of wear prior to 100k it looks like too much variation in the lifter quality.
This is it. POOR quality control by the part vendors MoPar is using.
Consider the quality issues when the first 3rd gens came out. I had a '04 hemi Durango that slung a rod for no damn good reason.
Spring failures, lifter failures, pushrods out of spec. Since things things have gotten much better but problems have not gone away.
As far a roller lifters; they have been used for in MoPar V8s from the factory since the 80s. The common thread I see with qualify is when they shut down the American production and moved production to Mexico. I have a pix of the hole in the hemi block and right next to it is says "hecho en Mexico"