yes thats what im saying, maybe there was not any failures outside of the normal percentage they deem acceptable, but yeah we would need to know the inner testing procedures, really the only way to actually know i spose
I think the theory is that Ford is putting a (mystery) additive in the engine at the factory that stops the cavitation noise. It's lost when the oil is changed.
Theory is the anti-friction/anti-wear coating that's built up on parts from oil being ran is being stripped away by the new oil at an oil change. That is a known thing that happens. Also explains why an additive like Ceratec or XL-17 (anti-friction/anti-wear additive) quiets the BBQ ticking in short order. And also explains why some guys report that their ticking slowly goes away the longer the oil is ran, but then shows up again with a new oil change - the new oil stripped off the built up anti-wear layer.
Yes and no. Coming from the truck side of things, the standard is to have different phases of testing. The starting phases are all pre-production sample builds. These are fully tested on a engine dyno, and end up in test vehicles for validation, endurance, emissions, etc. By the last couple phases, the engines are full production line built samples. These should be exactly the same as normal production. The engines get full testing. There are also voice of customer vehicles built using production engines, and these will go out to customers in the field for testing. Up to this point, every engine gets pre and post testing, as well as full tear down inspection. Once released for production, every engine will get a short functional test at end of line, and every Nth engine will get full hot test (N being 100 for my previous company). Ford will also occasionally buy back high mileage vehicles for full testing and analysis. Even with all this testing, things get missed. Happens all the time, unfortunately.
Wut? The rattle clearly exists. It's a specific noise that only occurs under light load around 2-3k rpm. It has nothing to do with gear changes. My video of the noise was done in neutral. Mashing my foot to the gas makes the rattle go away.
It exists. On mine, anyway. Easy, easy, easy to hear.
So the Gen3 Coyote went through all that development and testing and nobody said hey: "This thing ticks a lot at idle and it rattles like crazy at around 2000 RPM".
This right here...^^^. My '18 is has the '2k rattle' and is very repeatable under light throttle load in that 2k-3k area...
Seems odd to me as well. However, they can still make production changes after launch. Not sure if a change happened right when they started ramping up. That, or they heard the noises and blamed it on the DI.
Yes, anything is possible and we wouldn't know unless the whole process was followed or audited for how complete their testing and production was/is.
i'm just glad... it's not in my garage! dman
Wondered this myself. The SSM may indicate that they knew all along but didn't think we'd care and just accept it. Particularly since folks here have said that other models have it, and they seem to be selling just fine. Doesn't explain why they were replacing engines though. Unless someone at Ford in the engine replacement chain one day suddenly woke up and went 'wait...what?...oh no not THAT tick...that's normal!!!'.