Best explanation I've seen so far for Hemi cam/lifter failures

208Dart said
Regarding oil pressure:
I just bought a 2013 Ram 1500 5.7/ZF8 yesterday with 136k on it. Previous owner bought it at 100k miles and in 15 months put 35k+ on it driving from Idaho to Montana a bunch, so mainly highway miles recently.
Engine at operating temp runs 36-37psi oil pressure and cruising on the highway runs 50+psi.
Also has very little idle hours.

It HAS the lifter tick…. Only at startup for about 30 seconds then it goes away. I’ll likely do a cam swap/MDs delete this summer on it sometime. I don’t think it’s an oil pressure issue….

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I think for it to tick for just the first 30 seconds shouldn't be an issue, I wouldn't be worried about that. If it continues ticking especially after it's warmed up then it's a problem. If you want to do a cam+lifter swap anyway that's fine but if it's only because you think a lobe/lifter is going away I'd give it some time and see if it gets worse. Even the owner's manual on the newer trucks says that ticking for the first 15-30 seconds on cold startup is normal.

Honestly I'd check the exhaust manifold bolts first, those like to break a lot and the exhaust leak will sound almost exactly the same as a lifter tick.

Ironracer said
I know Exactly how to fix it...get one with a Cummings!

And deal with either emissions control garbage and crap mileage for a diesel, or a 15-year-old truck that's falling apart because it's a Dodge? mmm I dunno... not to mention the way higher upfront cost. There are millions of 5.7 Hemis on the road, even if the failure rate is less than 1% that's still a shitload of failures simply by the overall volume. I dream of owning a Cummins but nothing about them is cheap.

I wonder how many old-timers back in the 70s talked trash about Chrysler engines with the nylon cam sprockets or horrible manufacturing tolerances/performance variation, and would prefer an old flathead inline-6 instead lmao.