I talked to the Sheriff of our town acouple years back and they infact were getting rid of all there Chargers because of cam failures and he told me the other town south of me was doing the same.
Said everyone they had has had cam failures and in most cases had to have the motor replaced because of it.
I have read many other people say similar comments and the only chargers I see anymore are hwy patrol cars.
So I agree with the theory that these motors do a poor job of oiling the lifters and cam at idle.
I was curious about that. I assumed police vehicles would like be the worse case for idle hours on an engine. When the charger came out it seemed like a lot of departments switched over to them. Then several years later, those same departments seem to dump them for a different make/model. At the time, I heard issues with front end parts.
My 5.7's were always tick free (besides broken exhaust studs), but this 6.4 I bought new last year has ticked since day one. I missed it on the test drive and only noticed it a several days later when I rolled down the windows for the first time. Being ignorant of what hemi tick was, I thought it was an exhaust leak or a flapper valve I read about in the exhaust. If I had noticed it during the test drive I probably would have opted for a cummins instead. I missed my old pre-emissions powerstroke grunt and wanted another diesel. However, when I ran the numbers cummins vs 6.4 mpg/cost, the 6.4 for me was the cheaper option to fuel per year. I have a short 7 mile commute to and from work with a lot of stops. Between that and the initial purchase price, I had committed myself to the 6.4 as I couldn't justify the extra initial cost of the cummins, higher yearly fuel costs, and maintenance.
Right now, I'm 300 miles into using redline on a 10k mile truck. The tick is there, but it's quiet down some. I checked yesterday, my gauge had about 49 hrs of idle time already. I think from here on out, I'll use the remote start less.