Lifter/pushrod failure questions?

[M1ck3y]

It all depends how attractive you are, or how much money you have 

[HondaHawkGT]

On 12/4/2021 at 12:38 PM, voided3 said:

I agree it should just be given to all owners of the '21 model year trucks, though. I believe Hyundai did a similar engine warranty extension on certain years of their 2.4 Theta II I-4 engines as they had block casting/crank bearing issues on those, for example (though Hyundai has a more generous 10 year, 100,000 mile powertrain warranty to begin with).

 

Hyundai denied warranty coverage for years and thousands of people were stuck with the bill on Theta II engine failures. Maybe they recently began to warranty them, but I saw mountains of angry comments from people that paid out of pocket for an engine replacement for their practically new Hyundai/Kia. Even today they're dragging their feet and telling owners not to park their Theta II powered vehicle in their garage because of the fire risk. 

[KARNUT]

16 minutes ago, HondaHawkGT said:

 

Hyundai denied warranty coverage for years and thousands of people were stuck with the bill on Theta II engine failures. Maybe they recently began to warranty them, but I saw mountains of angry comments from people that paid out of pocket for an engine replacement for their practically new Hyundai/Kia. Even today they're dragging their feet and telling owners not to park their Theta II powered vehicle in their garage because of the fire risk. 

I’ve owned 4, an 05 and 11 still. Hyundai basic warranty is 5-60 bumper to bumper, power train 10-100K. I had only 1 claim on the 11. The radio gps backup camera. It was replaced no problem. Although I never had a engine problem, I seriously doubt they would turn down an engine problem within the warranty period. I did hear about an engine recall on certain 4cylinders engines. I would have to assume that’s after the 10-100K period. That to me would be unusual and unprecedented. 

Edited December 20, 2021 by KARNUT

[YZ-Dave]

When the sun goes down - the issues are in the manufacturing of the lifters themselves. Most of the failures are in the DOD lifters (the GenV small block has actually three different lifters in it - cylinders of 1,2,7 & 8 use a traditional roller style hydraulic lifter, cylinders 3,4,5 & 6 use lifters that bleed down when the DOD system is activated, and there is a solid lifter used on the high pressure fuel pump (that is the one that makes all the noise BTW).

The DOD lifters fail when they bleed down all their oil when the DOD is active, and when the system shuts off and it is time for them to fill back with oil, the pistons inside bind and dont fill with oil all the way, leading to large amounts of valve lash.

Now the traditional lifters are basically the same lifters GM has used all the way thru the LS engine which had its known issues with lifters. When they fail, it was due to too tight of tolerance between the pistons and bores, where the lifters essentially go to a solid lifter. They end up tearing up the cam and or pushrods.

In all honestly things like the oil you run, maintenance interval, etc.. will not make up for these issues. The GM lifters are known to just have a high failure rate. High enough that on the high end engines like the LT5 and COPO engines they use aftermarket (Johnson) lifters.