Donut's tutorial-style rebuild video (YouTube, published July 10, 2026) shows the transition from outsourced machining to in-garage reassembly of a Porsche cylinder head. After LN Engineering completed the machine work, the creator walks through cleaning, part inspection, valve and spring installation, and initial torque/check routines as part of the project engine rebuild.
Donut completed final machining on the Porsche cylinder head with help from LN Engineering (lnengineeringllc) and posted the reassembly attempt on July 10, 2026.
Hello Molecules! The last of the machining is finally complete for the project Porsche’s new engine thanks to @lnengineeringllc now let's see if I can put it back together… #projectcar #automotive #cars #mechanic #porsche
Channel: Donut
Published: 2026-07-10
Video URL: https://www.youtube.com/watch?v=MszZjPEQ_VA