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I have an Eddy headed 318 with the 340 Hi-po exhaust manifolds. The bolts loosen every time I drive it. Is it Ok to use Lock-Tite for this application? That's the only solution I can think of to solve the problem.



I use Permatex anti-seize lubricant #133K on my aluminum heads. You might also want to check your exhaust hangers and make sure the exhaust system isn't flopping around.



I have a tti system and everything is tight. I idled the car for 15 minutes the last two nights, to warm it up, and I had some looseness to the fasteners. As the previous poster, "donbarnes" said, I think it has something to do with the different expansion rates. I can't think of any other solution besides using anti-seize.