So I have the week off and I decided to make a new exhaust manifold. When I removed the old manifold, I heard a weird noise coming from inside the thing.
It seems to be a one way valve/flap to stop flow from cylinder number 1 feeding back up into cylinder number 2.
Notice the hot spot, the dry rusty area, as opposed to the wet looking area around the turbo flange. Excuse the filthy hand, its hard to keep them clean working on old cars like mine (2006 build) lol.
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