This guys EXPERT opinion is it is the needle bearings on the lifters.
So literally every shop knows about the hemi failure rates. of course keyboard warriors just kick back and say hemi's are great hemi's are great, but the fact is they fail at a huge rate. Guys with hemi's need to look at hearty oils to maybe prolong the time before that thing dies. At least 5w30 as a good strategy. Of course, there aint much you can do if a needle bearing fails. We know for a fact hearty base oil paired with heavy aw/ep additives can end ticks/knocks that random group 3 leave behind, that is a fact. Maybe if you kill the tick you will extend the life dunno, but anyone who tells you to choose an oil that makes your car/truck tick when another oil will allow it not to tick, you should tell them to pound sand.
youtube mechanic explains hemi
So literally every shop knows about the hemi failure rates. of course keyboard warriors just kick back and say hemi's are great hemi's are great, but the fact is they fail at a huge rate. Guys with hemi's need to look at hearty oils to maybe prolong the time before that thing dies. At least 5w30 as a good strategy. Of course, there aint much you can do if a needle bearing fails. We know for a fact hearty base oil paired with heavy aw/ep additives can end ticks/knocks that random group 3 leave behind, that is a fact. Maybe if you kill the tick you will extend the life dunno, but anyone who tells you to choose an oil that makes your car/truck tick when another oil will allow it not to tick, you should tell them to pound sand.
youtube mechanic explains hemi