Sandblasting

[Mick]

Hey i just got my exhaust manifold and dmp pipe sandblasted for $25 and danm they look shit hot compared to the rusty things i dropped off to them. Now the exhaust manifold still had the 4 studs for the turbo in it and they got sandblasted as well, so should i get 4 new studs for it now because the coating is taken off the studs and they will more than likely rust up ?

and also will the flanges need to be machined because the sandblasting leaves the the flanges with a matt finish compared to the shiny machined finish.. the surface looks like a sheet of 1500 - 2000 grit wet and dry so its still very smooth ..

[Craved]

the exhaust gasket should take up any of the slack on the surface!!

got any pics of this work?

[Roy]

Before getting spomething blasted the faces that dont require or shouldnt be blasted should be taped up, saves a bit of agro down the track.

[B-Man]

Is this the same as extrusion honing ? (sand blasting the inside of the manifold)

I've been thinking of doing this to my std exhaust manifold since it is off the car - and if it is chaep to get done (ie don't want to spend too much on something that may be being replaced something down the track)

Might help with flow ??

Sand blasting then powder coating the outside might be an option too - but only if economically viable - for the gain. Which I suspect it wouldn't be.

So I prolly won't do it.

OK, I'll shut up now.