Videos tagged with Spark Plug Hole

This video provides expert guidance on common Harley-Davidson engine rebuild issues, focusing on push rod adjustment for both solid and hydraulic lifters, and setting ignition timing. Dragonman emphasizes proper bleeding of hydraulic lifters and a precise method for timing without relying solely on factory marks, using piston position relative to Top Dead Center. The session concludes with advice on tightening head bolts after the engine warms up.

This video demonstrates an advanced gunsmithing technique for machining a dual spark plug hole into a Harley-Davidson Shovelhead cylinder head using a milling machine. The process involves precise alignment, controlled milling with an end mill, drilling, chamfering, and finally, tapping the new thread. The instructor emphasizes the need for practice and careful pressure application during threading to avoid damaging the head or the tap. The modification aims to improve combustion efficiency.