Ya alot of it can be left to speculation. We can continue this debate, just skip the name calling.
Since the topic is pointing to lifters. Most of the failures are not the actual lifter's fault. In the case of a 5.7L Dodge. There is alot of high mileage engines with no failure but engines that see alot of idling are prone to failures. In this particular engine, splash from the crank is not great at idle speed.
In the LS, most of it is related to Displacement on Demand and it's usually the cylinders that get cut. When the DOD is active a lighter spring allows the lifter to collapse. It is this mechanism that failures but if ignored, it's the lifter roller and cam lobe that get damaged. I know it's only 1 example but I have a 370k on my 6L truck, no DOD and the lifters in these do not fail.
Since the topic is pointing to lifters. Most of the failures are not the actual lifter's fault. In the case of a 5.7L Dodge. There is alot of high mileage engines with no failure but engines that see alot of idling are prone to failures. In this particular engine, splash from the crank is not great at idle speed.
In the LS, most of it is related to Displacement on Demand and it's usually the cylinders that get cut. When the DOD is active a lighter spring allows the lifter to collapse. It is this mechanism that failures but if ignored, it's the lifter roller and cam lobe that get damaged. I know it's only 1 example but I have a 370k on my 6L truck, no DOD and the lifters in these do not fail.
