[Bumbleboy92]

93k miles, skip to 13:32 for the cause (spoiler: it’s the lifter)

[Dynamical]

Another lifter Seems to be the top reason these motors kill themselves, although I still do believe the jury is out on the 2020+ cars for having the potential L87 crank/bearing failure issues. The DI loading up the intake valves with charcoal doesn’t seem to be an issue which is good. Not yet at least. Happy Easter everybody!

[m6-lt1]

While it is a lifter, as he pointed out it wasn’t the usual failure where the AFM part of the lifter gets stuck. The roller failed for some reason. This engine had its oil changes on time so I wonder if it was tracked a bunch. Lifters aren’t going to last forever in a road coursed car. 2018 was a solid year in terms of LT1 quality as it was built well before the post covid engines that seem to be spinning rod/main bearings.

[bishopts]

Originally Posted by m6-lt1

While it is a lifter, as he pointed out it wasn’t the usual failure where the AFM part of the lifter gets stuck. The roller failed for some reason. This engine had its oil changes on time so I wonder if it was tracked a bunch. Lifters aren’t going to last forever in a road coursed car. 2018 was a solid year in terms of LT1 quality as it was built well before the post covid engines that seem to be spinning rod/main bearings.

This is true.
Rollers failing in a lifter is likely in any modern engine since all of them use rollers on the lifter or rocker. Dodge 3.6 do it more than any engine built by GM.

[Stihl]

He said that engine was out of a manual transmission car. The manual Camaro SS does not use AFM, only automatic cars do, correct? I understand it is the same lifter. So it is more about the quality of the lifter versus the actual AFM process?

[beowulf556]

Originally Posted by Stihl

He said that engine was out of a manual transmission car. The manual Camaro SS does not use AFM, only automatic cars do, correct? I understand it is the same lifter. So it is more about the quality of the lifter versus the actual AFM process?

I think I read that our manual cars still have the same afm crap in there.

[arpad_m]

AFAIK lifters are the same between the auto and manual Camaros (4 normal and 2 or 4 AFM capable), it's just that the AFM ones are never activated on the manual.

[Stihl]

Thanks for the replies. Owning a 2019 manual SS, I was just trying to figure out if I am in for lifter failure in my future

[beowulf556]

Originally Posted by arpad_m

AFAIK lifters are the same between the auto and manual Camaros (4 normal and 2 or 4 AFM capable), it's just that the AFM ones are never activated on the manual.

So do m6 cars have the same chance of lifter failure as autos or less because the components don’t get used?

[arpad_m]

Originally Posted by beowulf556

So do m6 cars have the same chance of lifter failure as autos or less because the components don’t get used?

I don't have hard and reliable data on this, sorry. Anecdotally, M6 cars still incur lifter failures, but much less frequently than A8/A10 cars, so DoD activation and deactivation does make the problem worse, this is why tuning it out (or using a Range device) helps.

The overall failure rate doesn't seem to be very high, though. These lifters are used in hundreds of thousands of GM vehicles with a V8 engine each year, so any meaningful failure percentage would affects tens of thousands.

[beowulf556]

Originally Posted by arpad_m

I don't have hard and reliable data on this, sorry. Anecdotally, M6 cars still incur lifter failures, but much less frequently than A8/A10 cars, so DoD activation and deactivation does make the problem worse, this is why tuning it out (or using a Range device) helps.

The overall failure rate doesn't seem to be very high, though. These lifters are used in hundreds of thousands of GM vehicles with a V8 engine each year, so any meaningful failure percentage would affects tens of thousands.

Good info as always, thank you sir