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I have been fighting this same problem for a long time, a member on here said that detonation will shake them out, I'm thinking that might be the case.




Yep, I have first hand experience with this. The plug falling out is symptom of problem.




A friend crashed his Firebird this summer, because of a freeze plug coming out. We were spraying it for the first time this year and I put a little more jst in then before, well it took off and was on a low 9 sec pass, the plug came out, went left, then right into the wall. we've already fixed it, but I'm nervous to take it out again.