Rusted exhaust manifolds

[frank1966]

 Can I purchase new manifolds that will not rust?

Will it be a big job to sand off the rust and paint?

[AKcharger]

Yes and yes...both depend on $$

I looked at "jet coat" its a ceramic coating process. Never did it but looked good!

[birdsandbees]

Media blast them and paint them with VHT high heat paint in Cast color. Bake them properly per the cans instructions in an old stove before installation..

These have over 2500 miles on them since installation.

[GreenMachine]

Media blast them and paint them with VHT high heat paint in Cast color. Bake them properly per the cans instructions in an old stove before installation..

These have over 2500 miles on them since installation.

Did you use the "Flame Proof"?

https://www.summitracing.com/parts/vht-sp998

If so, don't you have to heat them to 600°? How did you get them that hot? My oven only gets to 500°.

Would the "Engine Enamel" hold up?

https://www.summitracing.com/parts/vht-sp997

[frank1966]

How do I media blast?

[forphorty]

If they're new they shouldn't need blasting , but need to be cleaned well to make sure they are free of oil or other contaminants. Old rusty manifolds could probably be soaked in vinegar for a few days. No, "engine enamel" will not hold up.  I used VHT flameproof black on my headers. Started the engine and let it run until they smoked a little. Shut it down and let it cool a little bit. Started again and ran it until it started smoking again and shut it off. Did this 3 or 4 times. It is holding up so far but I've only got maybe 1000 miles on it.

[frank1966]

If they're new they shouldn't need blasting , but need to be cleaned well to make sure they are free of oil or other contaminants. Old rusty manifolds could probably be soaked in vinegar for a few days. No, "engine enamel" will not hold up.  I used VHT flameproof black on my headers. Started the engine and let it run until they smoked a little. Shut it down and let it cool a little bit. Started again and ran it until it started smoking again and shut it off. Did this 3 or 4 times. It is holding up so far but I've only got maybe 1000 miles on it.

Can i soak in vinegar and sand by hand?

[forphorty]

After the vinegar has removed the rust, rinse them with water with baking soda to neutralize them.  Dry them off with compressed air if you can, as they will quickly flash rust.

[birdsandbees]

Media blast them and paint them with VHT high heat paint in Cast color. Bake them properly per the cans instructions in an old stove before installation..

These have over 2500 miles on them since installation.

Did you use the "Flame Proof"?

https://www.summitracing.com/parts/vht-sp998

If so, don't you have to heat them to 600°? How did you get them that hot? My oven only gets to 500°.

Would the "Engine Enamel" hold up?

https://www.summitracing.com/parts/vht-sp997

I used the VHT from our Canadian Tire, but yes the last bake temp is spec'd at 600F. I used the oven through each temperature step to as far as I could @500 and then I hung them in front of Gramma's old parlor stove and stoked the fire.