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#1
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exhaust manifold holes
HI guys,
Removed the exhaust manifold for painting, can you inform me why some holes are bigger then others, the screws are all of the same size!!! Don´t know wich color to use, maybe silver so I can use the same ink on my calipers!
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--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
#2
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I would guess that the holes are bigger to allow for a bit of expansion.
Good luck getting the paint to stay on. |
#3
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Yes, for expansion. Since the manifold is iron and the head is aluminum, they expand at different rates.
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#4
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Quote:
I'll use high temp paint, why whouldn´t it stay on??
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--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
#5
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I used HiTemp Engine paint, color Cast Iron. The first time I started the engine they turned pink. The paint had about a week to dry so I thought all was well. Oh well, it finally burned off and are the same color of rust they were before the paint. I do believe there is a special Header paint available but I think it is rather expensive and hard to find. Ceramic coating is also available and it holds up perty good. Also expensive and not to many places do it. Usually it is a place that does powder coating.
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84 500 SEL (307,xxx miles) |
#6
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Please read the directions on the can VERY closely. You MUST follow the curing directions exactly or it will burn and flake off when it gets hot.
Most say to paint the manifold, let it dry for 10 minutes, cure in an oven at 450-650*f for ~4 hours and let it naturally air cool down to room temp before it's used on the engine. |
#7
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Quote:
which obviously means that the manifold is going to be much hotter...
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82' 300SD |
#8
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Other way around. Gassers run much hotter.
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#9
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What's the temp that this cars achieve at the manifold?
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--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
#10
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Gassers can get 1600*f+, stock diesels usually run 1000-1250*f.
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#11
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After cleaning it pretty good, I painted it with +600ºC INOX based paint, now it has to dry for at least 72h to gain maximum resistance, this paint looks pretty good!!!!!!
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--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
#12
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Pic of the finished product:
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--------------------------------------------------- Mercedes fanatic 1985 200D (w124) and totaled 190D |
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