Setting Top Dead Center (TDC) is a major step during engine work as it is the point at which all mechanical events are timed to.
We're going show you how to build a quick and cheap piston stop using a generic spark plug anti-fouler, which costs under $5. These tools can be found online and in many speed shops, but are becoming less common in local parts houses, so we'll dive right in on a DIY solution!
Read the full article at Hagerty.com: https://www.hagerty.com/media/maintenance-and-tech/wrenchin-wednesday-how-to-build-a-diy-piston-stop...
I made a simple tool for this purpose over forty years ago merely by knocking out the ceramic part of the spark plug itself and adapting a suitable rod to go through the centre. Screw it in and off you go.