Forum Discussion
Here's an update after the teardown and some history.
I bought the RV with 17,000 miles on it. Did an oil change around 19,000 miles with OEM Ford filter. I don't recall what brand was on it before, but it wasn't OEM. The engine seized at the 21,000 mile mark.
As you see in the pictures, the first four pistons were heated to black and were seized to the crank shaft. The oil sump filter is clogged with a fibrous material - which I am thinking is it filter media. If so, that might have been the issue & caused the oil starvation. Then it started eating away at the bearings and sending metal material to the oil pan.
Dammm Fram strikes again it appears.
Have heard all about how Frams are supposedly improved in the last (however long), but I saw it first hand a long time ago thankfully on a small engine (2 cyl mower engine) and that was enough to never buy an orange colored oil filter again.
Doesn’t help and appears it wasn’t you who used one. There’s also the possibility that being an older used RV with super low miles that the previous owners didn’t do regular maintenance. Given it likely had very few or zero miles per yer for a Buncha years.