Intake manifold crack in heat riser

Posted by Tobs On 2010/8/30 15:58:11
He who looks for trouble finds it....Started cleaning up the in and exhaust manifolds for clean, derust and paint...and found a crack in the intake manifold on the engine side of the heat riser(hot box) whatever you want to call it. The flap had been working, and the spring I had replaced a while back, so the door was working, but it looked like there was years of sedimentary rock built up in that cavity that either froze, or expanded from heat and broke the manifold....
So, getting a 25 pound manifold over here isn't going to be too cheap. What are my other choices? Fill the cavity with something and block off the heat riser in the warmed up position? Install a thin plate between the intake and exhaust manifolds? If the car takes a few minutes more to warm up, well then that's how it's gonna be.... Can I block off jst half, and still keep the warming function to the half that is still whole?
Thanks 'packies'

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