I dropped off my intake manifold at the local machine shop for cleaning, and they tell me it's a tough job, and will cost $80. The story is that only bead blasting will do the job properly, since it's "from a diesel." Does this sound correct? They did offer a less expensive soaking, but say it won't be very effective.

Call me cheap, but I was expecting maybe $25-$30. The gunk inside is definitely nasty, but doesn't seem hard. Gasoline softens it up quickly, but I don't want to soak an entire manifold in a pool of gas!

What to do?

__________________
Rob