Has anybody had or know if V8 intake manifolds can be machined at the intake port gasket surface? I have one that is warped on the passenger side at the exhaust crossover.
This manifold has the two slits cut out on the two center bolt holes. I never could figure why they did that. It almost looks like the solid style would have held up better to the heat. The driver's side is still flat.
you could probably have it machined, but if too much is taken off, it is going to change the geometry of the intake to cylinder head fitment. a machine shop will probably be able to "splain" it better
The split is due to the cold intake ports and hot crossover, most likely would warp more without them. You can have it machined and if the heads have been milled that's OK. When the heads and/or deck are milled the heads sit lower and closer than if they were not milled and the intake manifold ports sit up slightly higher than normal, when a lot is taken off the deck- head mating surfaces the manifold is machined to correct the alignment. You could gasket match after it's machined. If the intake sits too far down us a thick intake gasket.
One chart I saw this morning has one thou off the intake for every thou off the heads. Milling the heads results in the intake ports being closer together, milling the intake restores the fit. I don't know if the one to one ratio is correct but the machine shop will know. [or should]
Ok, I'm a bloomin' idiot! The leak was caused by using the wrong gaskets! Used the two with the small exhaust crossover holes. I didn't realize that in addition to holes being smaller, so are the outside dimensions of the gasket. The edge of the gasket was right at the edge of the intake port and eventualy gave way the exhaust pressure.
The machine shop checked the manifold and it was flat. My methods apparently weren't adequate to correctly measure any warpage.
