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Listeroid Engines / Re: crack in 6/1 head
« on: October 20, 2021, 10:48:42 PM »
Thanks for the replies,
I went with the JB weld repair, the crack after further inspection runs from one side wall to the plug and continues, on the other side of the plug to the side wall. I used a small paint brush and cut the bristles back to make it stiff, then used it with brake cleaner and compressed air to scrub the cast iron clean. With the brush I was able to scrub the JB weld in and down the length of the crack. Head is running 190f-205f, JB weld is rated to 500f. The engine has been run for 8hrs under load so far and the repair is holding.
This is not a ideal fix, but the crack running into the plug made the repair with welding look expensive to have a machine shop repair.
I went with the JB weld repair, the crack after further inspection runs from one side wall to the plug and continues, on the other side of the plug to the side wall. I used a small paint brush and cut the bristles back to make it stiff, then used it with brake cleaner and compressed air to scrub the cast iron clean. With the brush I was able to scrub the JB weld in and down the length of the crack. Head is running 190f-205f, JB weld is rated to 500f. The engine has been run for 8hrs under load so far and the repair is holding.
This is not a ideal fix, but the crack running into the plug made the repair with welding look expensive to have a machine shop repair.