Why did this Toyota Tundra Engine Catch on Fire? 3rd Gen Tundra Woes

Would love to know what you all think about this Tundra engine and why it caught on fire. Also, do you like the satchels?

00:00 – Intro
00:21 – Tundra Engine Fire
04:37 – More Dead Tundras
09:11 – A Flock of Satchels