How to remove rust from exhaust manifolds

[Cash68]

I have a 350 with water cooled exhaust manifolds. They're rusty on the inside, and okay on the outside. Any good ways to attack this?

I was going to try:

http://www.frets.com/HomeShopTech/Qu...stremoval.html

[RONNIE]

buy new ones or you motor will be full of water. cast Iron manifolds are disposible. use them a few years and the start to leak them boom!!!

[Cash68]

They're $1400. No.

[sschefer]

They're $1400. No.

Boom, they're 4500.00 now.

[baddjonny]

If there more than 4 years old your on thin ice, muratic acid thats used to clean swimingpools and rusty gastanks works thined between 3-5 to 1 also por 15 also makes a rust killer.

my2
jon b

[luv2gofast]

Metal prep which you can get from an auto paint store should clean them up. It's phosphoric (?sp) acid and is magic for cleaning steel to get paint to stick. It removes the scale from hot rolled steel!

[RONNIE]

better get anothetr junk yard motor for it! afgter you clean off the rust it WILL leak water and ruin your motor!!!1 don't listen to anyone here do what you want! go find another fourum to tell the people that are tring to help you NONONONONONONON!!!!! go away.

[sammythebull]

this way it everyone on S/Fs fault his motor blew up not his, its great to ask the question over and over again till you get the one you made up in your mined before you even ask

[luv2gofast]

I don't know anything about big heavy motors and their manifolds so don't take my advice...but if you want to get rust off of something and you are smart enough to be able to tell if there is enough of it left after you get the rust off, then try metal prep.

There does that cover my stern???