5.7 cam/lifter issue explanation

Lane Attaway said:

So I just felt the need to share this info with everyone here who has the 5.7. I cannot remember the fellas name for the life of me but I found a video on YouTube of a guy explaining what causes the hemi to eat cams (hopefully someone else has seen this!!). Basically the video explains that there’s a support bar through the block for rigidity directly under the cam which is mainly splash lubricated (gets oil from the crankshaft throwing oil up) and idling is the culprit to killing the cam. At idle, it doesn’t get enough oil but with higher RPM, it’s fine. Just thought I would add this info to the forum!!

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Lane Attaway said:

So I can’t say for certain because, it is my opinion lol, that video along with working at a CDJR (Chrysler, jeep, dodge, Ram) dealership fully convinced me, MDS is not at fault for eating cams but can be blamed for failed lifters. It depends on how they failed. When MDS is at fault, the lifter collapses and the tick you sometimes hear on startup from them or after oil changes doesn’t go away. Ram definitely seemed find a better supplier for lifters than GM because most of the time it was lubrication issues that I saw. When it’s purely a lubrication issue, the roller of the lifter that rides on the cam lobe locks up which lets the engine run fine but then begins to eat the cam lobe which eventually no longer opens the valve and causes a need for replacement. If I ever have to replace my cam and lifters, I will do a delete on the MDS! Until then, lubrication was to blame more than MDS so I just give the skinny pedal a little more love sometimes lol!!

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Burla said:

sounds like uncle tony

mds = best lubrication for the hemi

look up ram forum hemi tick threads, some good info here going back a decade or better.

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Wild one said:

Raising the idle rpm a 100 rpm is one of the best things you can do.

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