18 replies to this topic

[$way]

i have a mild steel maniflow manifold and was just wondering about rustproofing it?

can you get decent high temp paints?? or is it a bad idea to paint them?

[minimender]

i have a mild steel maniflow manifold and was just wondering about rustproofing it?

can you get decent high temp paints?? or is it a bad idea to paint them?

If your broke then use emulsion paint.
If not then high temp exhaust paint is good
best is motorbike 'Pot Black'

[minimender]

This one was sanded off then treated with a rust treatment (cu-rust I think) then sanded again and painted with motorcycle Pot Black.
It leaves a nice matt silk finish, doesn't burn off and will last a long time. You can also touch it up as nessesary and you cant see the join ...

Oh, and a small tin goes a long way

Edited by minimender, 10 January 2008 - 02:21 PM.

[strebblo]

V high temp paint isn't that spensive either from here:


Ebay link

They do a few different colours too. Will be doing mine when I be bothered!

[Dan]

Since exhaust manifolds are continuously full of superheated steam and various acidic vapours while the engine is running , they rust from the inside out. Painting the outside won't have much effect on how long it lasts really.

[strebblo]

It will keep it looking nice at the very least though. And less rust has got to be better?

Stainless is the way then... oh well, start saving now.

[Dan]

Well exhaust manifolds are a bit hot for most types of stainless really. There have been some photos of really badly melted ones on here before. A mild one should last you at least 10 years, painted or not.

[minimender]

If the exhaust gas is hot enough to damage the pipe then your ignition is badly retarded.

[Guess-Works.com]

Ohh I don't know, I've had mine rather hot

[minimender]

Ohh I don't know, I've had mine rather hot

Hot enough to have the pipe glowing is what you need to damage the metal and is too hot , remember the exhaust valves will be even hotter !

[Bungle]

i painted mine with the halfords high temperature paint but it started to flake off after 2 years

[$way]

dont think ill bother painting it then.

cheers

[minimender]

dont think ill bother painting it then.

cheers

I would, it wont get rusty on the outside then and will look a lot better than a rusty one.
It wont melt or catch fire, take no notice of the scaremongers

[Sprocket]

Funny how the high temp paint is 500c and exhaust gas temps are 600c


What does that tell you how long the coating will last

[$way]

dont think ill bother painting it then.

cheers

I would, it wont get rusty on the outside then and will look a lot better than a rusty one.
It wont melt or catch fire, take no notice of the scaremongers

yeah everyone seemed to go off on a tangent.

but if the manifold will last for years unpainted then it'd be a waste of monies. yes itll look good but the moeny would look better in my pocket lol.