Re: troubleshooting hot manifolds
I hit them with a 5500 psi pressure washer, with a fine tip (cuts the paint off, and etches the cement, almost a waterjet!) That will blast all loose enough scale off, and if housing is too thin it blows through it to. Acid etching I have never done, but seems more than needed. Maybe just fish around the pasages with a stiff wire, and then hose em out
I hit them with a 5500 psi pressure washer, with a fine tip (cuts the paint off, and etches the cement, almost a waterjet!) That will blast all loose enough scale off, and if housing is too thin it blows through it to. Acid etching I have never done, but seems more than needed. Maybe just fish around the pasages with a stiff wire, and then hose em out
