Intake manifold runner cleaning?

[Juevo]

so ive got my intake manifold off and theres a pretty good amount of build up in the runners, what did you guys do to clean these or is it even necessary to clean them out?

[82eye]

i just blasted mine out with carb / injector cleaner

[88Sedan]

I highly recommend Gumout brand carb cleaner, it works significantly better than others I tried. Noticeabley better.

[Juevo]

thanks guys, i already got most of the gunk off the outside of it, time to take care of the runners next

[digger]

wire brushes and solvent / carb cleaner

[ZeKahr]

Use chemicals to clean the runners. I would speak with a dry ice blasting guy to see if dry ice can knock the carbon deposits out. If not dry ice, you can speak to a sand blaster guy and see if he’d be willing to blast the runners for you.

[TobyB]

Never really bothered with it as long as it wasn't really crusty...

t
also doesn't clean the outside, either.