The Honda shop told me I had a crack in the exhaust manifold on my Civic and that it was going to be expensive to replace. I probably could have taken it to a muffler shop for a little cheaper. But I was looking at going ahead and replacing the exhaust manifold/catalytic converter myself and saving the money. A friend suggested JB Weld. But I did some research and found that JB Weld was only rated to 550 degrees. I needed something that would stand a high temperature. I found mentions of a product by Blue Magic called ThermoSteel High-Temp Metal Repair or QuikSteel Xtreme. It seems to be the same stuff, just with different labels. It’s rated to 2400F degrees. And it’s designed for high temperature metal repair for iron and steel. And my exhaust manifold is cast iron. For only $10 it was worth a try. I bought a small container of the QuikSteel Xtreme at my local auto parts store. It wasn’t too hard to apply and seems to have worked. My car is quieter and seems to be running a little smoother after the repair. It’s probably good not to have and exhaust leaking from under the hood also. Definately something I wanted to fix. I may go ahead replace the exhaust manifold/catalytic converter later.
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