Manifold Cleaning

[Karlm]

I finally picked up a '00 intake for my jeep. The problem is, is that it is really dirty. There is a heavy buildup of black junk on the inside of the manifold. It has almost formed a sort of tar. What is the best way to clean this piece? I am having of just having it done by someone else, but I don't really know what to ask for. I'm jonesin' to get this on so any help would be greatly appreciated.

[BenXJCA]

See if they can boil it. Or see if there is a metal stripping place. here there is one that soaks it in acid for a while. Work extremely well.
HTH

[eric91xj]

try to spray it with some really good carb cleaner and scrub it with a toothbrush or something. If that dont' work mix up a tub of that simple green all purpose cleaner and let the manifold sit in there for a while. Just wondering what is the advantage of the '00 intake over the '96? is'nt the intake plenum (sp?) larger or somethign like that.

Eric

[HossHoffer]

Any good machine shop will be able hot tank it for about 20 bucks. If not, then a can of intake cleaner, a good brush and some elbow grease.

[hawaiian89xj]

i have boiled them before in simple green concetrate, then clean with brake or carb cleaner

[RichP]

You need to remove the carbon, having it tanked in solvent is a good idea. If you are set in doing it yourself use a good carb/injector cleaner. Once you get it clean use a dremel and a grinder wheel to get rid of any sharp trash castings left on there, helps the flow some. Don't get wild with it though, a bras bristle tooth brush will also help clean it.

[Judd W. VA]

As much as i hate to say, just leave it as is. I think it happens because the extreme exhaust valve overlap on these later Jeeps that do not use an EGR valve causes reversion into the intake. When i installed a '99 intake on my '98, that '99 intake had only 8k miles on it!! Was already quite nasty inside so i spent time cleaning it out. Then when installing the Leach header 10k miles later and had the intake off was already nasty again. Has got to affect flow to a small degree but just have to live with that...is wasted effort.