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Powdercoat or Anodize?

I really don't know what of your two choices would work best. But what I noticed when looking at some of the 2015 models of the California, is that some have black valve covers as standard equipment.
 
I was staring at mine last night thinking powder coated black would look nice and not corrode like they are now.
 
I agree with John. Powercoat would insulate the covers and trap heat. Better to anodize.
 
you may be dissappointed with anodise ......cast aliuminium does not come up well, maybe laquer after.

but then it would be set for powder coat after...proper corrosion resistance
 
I would powder coat them black. While it could be argued the the thin film of powder coating would "insulate" them and retain heat I could counter that argument with the fact that flat black dissipates heat better and faster then silver or shiny aluminum. And while I know there are coatings that are made to insulate, standard powder coating is not one of them.
Anodizing does not work as well on cast aluminum and it also tends to fade. They likely would not be black for more than a few years.
The valve covers on my Griso are flat black. Powder coated flat black. No issues. Just use a coating made for higher temps. Make sure the guy understands these are valve covers and that they will get fairly hot.
 
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The "valve cover" on the 1400 is a dress cover. The oil tight valve cover is underneath.
The outer casting is vented, and does not achieve very high temperatures.
It is "hand touch warm" after a long ride in summer.
 
mikeaedmonds said:
I question? How is Guzzi doing it? I would lean to powder coating. High temps would have to be considered.
Click to expand...
The valve covers on the wifes V11 are coated, it is either fairly high quality paint or low quality powder coating as it wears well but does show a little wear.
The original valve covers on my Griso were also coated, as are the replacement ones on there now. There are lots of valve covers out there that are painted or powder coated.
If it is not even actually the valve cover but a dress cover then do with it what ever you want. At that point it seems it would not matter at all.
 
stephenm said:
The "valve cover" on the 1400 is a dress cover. The oil tight valve cover is underneath.
The outer casting is vented, and does not achieve very high temperatures.
It is "hand touch warm" after a long ride in summer.
Click to expand...

Based on this information, I'll change my opinion to powdercoat.
 
FIRSTMG said:
I really don't know what of your two choices would work best. But what I noticed when looking at some of the 2015 models of the California, is that some have black valve covers as standard equipment. I would order a black OEM valve cover from Moto Guzzi.
Click to expand...
 
I'd avoid powdercoat. My experience with vehicles is that PC does go dull in due course.
Paint is much easier to repair / recoat than PC. I have no experience with anodising.

GuzziMoto said:
I would powder coat them black. ..... flat black dissipates heat better and faster then silver or shiny aluminum.

And while I know there are coatings that are made to insulate, standard powder coating is not one of them.
Click to expand...

Hmm sorry but the black theory is rubbish. Black is only a factor as compared with, say, white in so far as reflection of light and absorption of heat is concerned. (e.g. a black car roof will absorb more heat whereas a white one will reflect more). It has no relevance to this particular issue.

It's true that PC is not designed to insulate and the choice of colour will not really matter a damn.
 
VladTepes said:
Hmm sorry but the black theory is rubbish. Black is only a factor as compared with, say, white in so far as reflection of light and absorption of heat is concerned.
Click to expand...

Dunno where you got your information from mate, but it flies in the face of science. Try doing a search on best colour for heat dissipation on google and observe the replies. Don't see any information supporting your stand, but a lot suggesting black is the best.

I learnt this in 3rd form science.
 
And heat sinks are often black.

I don't know how much of a difference it makes, or if it really makes a difference. But people smarter than I am seem to think it does.
 
Powder coat done correctly will work fine. The covers do not get that hot. In fact after the fueling mods you can lay your hands on them after a 1/2 hr spirited ride at 75 degrees outside.
 

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