2019 Dodge Ram 1500 Lifter Roller Broke!

[davesmopar]

@Old-Days-Rick

Regardless of how the roller broke it is ridiculous that a vehicle would suffer such a failure.

I have run my Caprice, my old prius, my old truck, my old camaro, basically amy car I have ever had to redline consistently and NEVER had an engine failure.

Although very rare, I tend to agree with you on this one…
You had a pretty typical Hemi lifter failure happen… A failed lifter is a failed lifter… Redlining an engine while it’s in gear and actually being driven should, by design, be something the engine is capable of handling as long as there are not any underlying issues…

The MDS (Multi-Displacement System) lifters in modern Hemi engines have a known history of problems with the needle bearings in the roller, along with lubrication issues… Over time, the roller can develop excessive wear or seize, which then wipes out the camshaft lobe and destroys both components…

The lifter didn’t fail simply because you took the engine to redline… The factory redline isn’t the absolute mechanical limit of the engine; there is a safety margin built into that number… Could repeatedly taking it to redline shorten the life of a marginal lifter?? Sure… But if one trip to redline is enough to kill the lifter, I’d say that lifter was already on borrowed time… The failure was going to happen sooner rather than later anyway…

I’ve redlined pretty much every engine I’ve ever owned and never had an internal engine failure because of it… The one exception is my old Chevy truck — and I actually drive that one pretty easy because the transmission has a known weakness with the sun shell and/or input sprag failing during WOT upshifts… That’s a different kind of failure altogether…

[davesmopar]

@TwinTurbo

pay attention to the third one-

I don’t think that doing an automatic upshift at WOT is considered Extended High RPM operation and or bouncing off the rev limiter…
Extended high RPM operation is what happens when you do burn outs or hold the trans in a lower gear keeping the RPMS up high and not letting the trans shift (like a standard trans or in manual mode with an automatic) and or like when Mustangman takes his Mustang to the race track type thing…

[jtsanders]

@Nevada_545

Do you remember the actor that ran himself over when he exited the vehicle while in drive?

Apparently that’s still possible. About three years ago my niece’s ex did this. He’s a cop and pulled someone over. He got out of his cruiser to approach the other car, but forgot to put his car in park. It ran his foot over when he tried to stop it. He couldn’t stand afterwards. The guy he stopped contacted the police to help the cop on the ground and stayed until help arrived.

[VDCdriver]

@Nevada_545

Do you remember the actor that ran himself over when he exited the vehicle while in drive?

I don’t recall that one, but when I was a kid, a local guy was knocked down by his own delivery van, and his head wound-up underneath one of the wheels. He was never the same.

But, whether this was actually an accident that was his own fault, or something else, we never knew. There were rumors that a Mafioso wanted the guy’s liquor distribution business, and after the accident, the business did change hands.

[Mustangman]

@davesmopar

I’ve redlined pretty much every engine I’ve ever owned and never had an internal engine failure because of it

Yup, me too! I used to shift my '71 Datsun 510 at valve float when I was whipping those 96 horses. Never broke an unmodified engine.

Didn’t break a modified engine until I started racing. I have trophies of some of those!

@davesmopar

or like when Mustangman takes his Mustang to the race track type thing…

Stock engine and automatic transmission with a 7500 rpm rev limit. The computer saves it by cutting spark and fuel but the automatic transmission up-shifts before it hits the limiter. I can hold the gear in manual mode but it still won’t rev past 7500. Modern electronics do a pretty good job of preventing the driver from doing most stupid things.

However it won’t prevent a “money shift” with a manual transmission. (4th is down and to the RIGHT, not the LEFT!)

[bcohen2010]

@Old-Days-Rick

I wasn’t borrowing it, I was test driving it. Have you never goosed a vehicle on a test drive to see what it could do?

I don’t understand this. A “test drive” is to run the vehicle through real-world driving conditions, not to “see what it [can] do”. This is a truck with an automatic transmission. A truck transmission is geared to provide maximum torque at low engine RPMs. I have driven many work trucks, and I own a 2000 Chevrolet Silverado, and I have never seen the tachometer in any of these vehicles go above 3000 RPM, even when trying to merge with fast-moving traffic, etc. In my personal truck, it rarely goes above 2000 RPM, unless I am accelerating at freeway speeds.

I do not believe that the engine ran to redline (presumably at least 6000 RPM) with the transmission in “D”, no matter how hard you floored it. There must be more to this story.

[Old-Days-Rick]

@bcohen2010

I do not believe that the engine ran to redline (presumably at least 6000 RPM) with the transmission in “D”, no matter how hard you floored it. There must be more to this story.

I turned onto a state highway, I had it in auto 4wd and I floored it. It shifted at whatever an automatic in those trucks shift at. I do not recall what that was, I was looking at the road not the tach

[TwinTurbo]

@davesmopar

I don’t think that doing an automatic upshift at WOT is considered Extended High RPM operation and or bouncing off the rev limiter…

Just going off what was written.

@Old-Days-Rick

I floored it and ran it to redline from 0 to about 70mph ONE time

@Old-Days-Rick

I goosed it, I roared the engine to the moon.

Granted, one time. But sometimes that is the straw that breaks the camel’s back.

It says OR-

“or bouncing off the rev limiter”

I’ve floated valves before, in my younger days. Fortunately, with flat tappet and no interference issues, it was a temporary situation and didn’t break anything.

[davesmopar]

@bcohen2010

A truck transmission is geared to provide maximum torque at low engine RPMs.

And what prof do have for that statement???

Your truck that you speak of has a 4L60E transmission in it, the 4L60E has the same planetary gear set ratio no matter what engine it is behind, meaning ALL 4L60E transmissions, no matter the year, make or model in oem stock form have the same gear ratios… meaning a Camaro, Corvette, S-10, Silverado, Tahoe, Blazer, Caprice etc etc etc …

What does/can change however is the rear gear ratio making the final drive ratio different between vehicles…

The same can be said for other transmissions also, most (not saying all) transmissions don’t change gear ratios (planetary gear sets) between different aplications, it would drive up the cost by a lot, you have to change the sun gear, planet and the ring gear in order to change the gear ratio…

Now some aftermarket transmission parts manufactures do offer different aftermarket planetary gear sets in order to change the factory gear ratios…

Also, trucks are not all geared for maximum torque at low engine RPMS, some are geared for maximum fuel economy, example, the 2016-2023 Tacoma V6 engine don’t even start to pull hard until 3500-4000 rpms, the engine utilizes the Atkinson cycle and dual VVT-iW, which requires you to rev higher into the RPM band to pull out its maximum power…

• Horsepower: 278 hp @ 6,000 RPM
• Torque: 265 lb-ft @ 4,600 RPM

In order for a vehicle to get the maximum torque at low rpms, the engine has to be built/designed with low rpm torque in mind, gear ratios only help to utilize the power management of the engine…
Yes the transmission and or rear gear ratio(s) can/will make or break the vehicles use of the RPM band, but the engine only makes the torque and HP power range…

Gears are simply mechanical levers; they can multiply torque, but they cannot create it… If an engine’s camshaft profile, displacement, and intake design are optimized to breathe at higher RPMs, no transmission configuration on earth will force that engine to make its peak torque down at 1,500 RPM…

Now the transmissions torque converter can/will have different flash (stall) speeds between different car and or truck applications to handle these different power bands better…

[db4690]

@Old-Days-Rick this doesn’t look superior

[Purebred]

Maybe he was thinking of the rearend gear ratio in a 1950 GMC half ton.

[Cavell]

I replace lifter/rocker and maybe drop oil pan to see what’s inside. And run it

[edwinjones512_197435]

"Can we get the thread back to the actual mechanical failure? Regardless of the test-driving etiquette or the side debate about gear ratios, a shattered lifter roller on a 2019 5.7L Hemi with under 100k miles is the real issue here.

The 5.7 Hemi is notorious for lifter and camshaft failures (the infamous “Hemi tick”), usually tied to the MDS (displacement on demand) lifters, poor oil flow/lubrication at idle, or just bad metallurgy on the rollers. Goosing it to redline probably didn’t cause the failure outright; it was likely just the straw that broke the camel’s back on a lifter needle bearing that was already failing.

Like @Cavell mentioned, the best path forward right now is dropping the oil pan to check for metal shavings, pulling the valve cover, and seeing how badly the camshaft lobe is chewed up. Has anyone here had luck just replacing the lifters on a 5.7 without having to replace the whole cam?"

[weekend-warrior]

@edwinjones512_197435

just replacing the lifters on a 5.7 without having to replace the whole cam?"

Microsoft Word - S2209000002 ocv debris.docx

[asemaster]

@edwinjones512_197435

he best path forward right now is dropping the oil pan to check for metal shavings, pulling the valve cover, and seeing how badly the camshaft lobe is chewed up.

I believe the picture in post #1 would remove any doubt that the camshaft has been damaged.

@edwinjones512_197435

just replacing the lifters on a 5.7 without having to replace the whole cam

So we’ve removed the oil pan to inspect for metal. We’ve removed the heads to get to the lifters. At this level of disassembly, wouldn’t it would be foolish to reuse the old cam?

[Old-Days-Rick]

@edwinjones512_197435

Like @Cavell mentioned, the best path forward right now is dropping the oil pan to check for metal shavings, pulling the valve cover, and seeing how badly the camshaft lobe is chewed up. Has anyone here had luck just replacing the lifters on a 5.7 without having to replace the whole cam?"

The options given were to replace the lifters and cam with no warranty or replace the engine with a warranty. He decided to replace the engine.