i'm buying a new 1997 2.4 motor and wondering if there's any tools to help clean the intake manifold? all ideas welcome, and if not how much is a new one and what's the part number? thanks

If you want to remove oxidation you wont need any tools. It only takes a large tub, a scrap piece of stainless, a battery charger and some washing soda. Make a strong solution of washing soda which you can get from walmart or kmart or even a supermarket. Put the positive terminal of the battery charger on the scrap metal. Place the negative on the part to be cleaned. The process will work at very low current settings ie 2 amps, but I'd say you could go as high as 10 amps as long as you remember not to stick your hand in the bucket. Try to keep the charger electrodes out of the water too. You can always stop the charger and move the pars around. The rust will start coming off immediately. Oh, and the bubbles you see coming off will be hydrogen gas. So only do this in a well-ventilated and NO SMOKING.

so would this work if your intake manifold is plastic?

No it won't....plastic doesn't oxidize. Oxidation is the technical term for rust. Just take the manifold to the closest manual car wash, drop in 4 quarters, and spray the thing out with the spray gun.

Heck, you could probably just stick it in your dishwasher and be fine.