Hot Paint

[Guest B1ack_Mi16]

I've just got my ekstra Mi16 manifold welded (it was blowing) and sandblasted:

http://stairway.fa-s.ntnu.no/~kristian/bil...ld/000_0008.JPG

 

Now I'm going to paint it. The question is what type of paint will I have to use? What temperatures will it have to withstand?

[Guest dave364634]

petrols run at circa 800degC, the exhaust hmmmm. cats are at 350-400. the manifolds nearer to the heat. maybe 600degC?

[Guest alexdeann]

ooohhh pretty

[Guest Gar]

Sorry, but if your engine ran at 800C, the whole block would be a nice shiny puddle under your car!

 

The thermostat opens at around 90c, so it should never get any hotter (in theory).

 

600c would make the manifold glow red hot. this can't be right, or everything around it would spontaneously combust (including the paint).

 

The manifold can't be much hotter than the block/head itself, as the two are in such close proximity.

[Guest Dom]

I would have thought caliper paint would be the best idea, not all too sure but i think it's tested to 1000 degrees or something like that.

 

I imagine brakes to get hotter than the manifold.

[Simes 248 2 Cars]

I used barbecue paint on the down pipe of my scooter - good for up to 1000degC.

Edited October 2, 2003 by Simes

[Gary 2]

Get some paint from Halfords called VHT.It comes in various colours and it can take the heat

[Guest Ben xs]

You want some Stove enamel paint, Halfords 'high temp' paint and all that is all crap and doesnt last, how do you expect paint to stay on metal that hot? Thats why it doesnt last very long..

[Guest LKHanberg]

couldnt one get it chromed? that would look so sweet...

[Rob_the_Sparky 9]

I have seen an exhaust manifold glow a very dull red (in the dark)...not usually that hot though.

 

Rob

[Guest B1ack_Mi16]

Hm. I really don't know. I thought the Exhaust gasses could get very hot, about 600-1000 celcius actually. After hard driving there's usually not a problem to get the manifold glowing, I've done this on an old Ford Granada 2.0, and guess the Mi16 engine which is more powerful also will be able to get it glowing.

 

I think I'll go to a local paintshop and ask them.

[Guest daz205]

is there some sort of heat reflecting paint you could use instead of exhaust lagging?

sorry bit off subject but just an idea

[Gary 2]

Halfords 'high temp' paint and all that is all crap and doesnt last, how do you expect paint to stay on metal that hot? Thats why it doesnt last very long..

If it didnt work,why do they sell it,ive used it loads of times on various motorbikes and a few cars and i've never had any trouble with it.

[Pugnut 9 1 Cars]

seen a cav turbo running big boost on a set of rollers . at max power the manifold and turbo were bright orange and you could even see the gasses flowing inside the manifold and round the blower .

 

vht is good stuff and i've seen it on the mi16 manifold before . it certainly seemed to look like fresh paint after it had been run a few times. its a matt finih though and greasy marks are permanent.

 

of course the water in an engine is app 90 deg but burning fuel and gasses are into the high hundreds.

[Pugnut 9 1 Cars]

I've just got my ekstra Mi16 manifold welded (it was blowing) and sandblasted:

http://stairway.fa-s.ntnu.no/~kristian/bil...ld/000_0008.JPG

 

Now I'm going to paint it. The question is what type of paint will I have to use? What temperatures will it have to withstand?

i would recommend welding the flange on the cyl head end also . its welded internally but mine and others i've seen mostly split there.

[Ahl 4]

When my manifold was repaired and ported it was painted with plasticote hi-temp paint.

I think it was up to 425 celcius, and it all flaked/burnt off within a week.