Piston stop

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A piston stop is a tool that screws into the sparkplug hole in the cylinder head, and extends downward into the cylinder. This tool stops the piston from moving, which in turn makes it much easier to work on engine components connected to the crankshaft, such as the flywheel and clutch drum.

Don't have a piston stop or don't want to drop the cash on one? Try the rope trick!

DIY Piston Stop

Done the hard way

Don't have a piston stop or don't want to drop the cash on one? Make one. Rumor has it you can smoke crack/meth/marijuana out of this too.

Hard Way

  1. - Find fouled plug
  2. - Break porcelain end off
  3. - Beat rest of porcelain out of it with a chisel and hammer (or other implements of destruction)
  4. - Take cable adjuster off old shitty cable and screw in place, with one nut on each side of the plug
  5. - You now haz a tiny, cute, functional piston stop

Easy Way

  1. - Find fouled plug
  2. - Cut plug at metal lip, just above the part a socket fits onto (side of metal away from threads)
  3. - Slide porcelain out
  4. - Take cable adjuster off old shitty cable and screw in place, with one nut on each side of the plug
  5. - You now haz a tiny, cute, functional piston stop

Need further instruction on making your own? Read the Homemade timing tool page -- it's basically the same concept.