Blocking Air Injection System

[Bobbrumby]

If you want to block of the a.i.s. valve without a welder and back at the heads, to stop molten platic entering your inlet when valve goes bad. I found a $1 coin is this right size to block it off with the nut you get off the pipe. Also for all you cheapskates out there, like me at first, a 10c piece is a little too small. Bolt it down tight and it should seal nicely, I could not feel a leak.[/u]