Removing the Headers

2000 Views 12 Replies 6 Participants Last post by AA, Jun 15, 2007

OutlawS3

Discussion Starter · Jun 7, 2006

I'm going to drop off my exhaust to get them ceramic coated Friday. Never removed the header before any advice? Does the radiator need to be removed or just swung out of the way.

Any help would be appriated from someone who has done this.

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Martin_R

· #9 · Mar 20, 2007

Wasn't copper in a steel-alu connection very bad corrosionwise?

Steel in aluminium will make the aluminium corrode some.
Copper in aluminium will make the aluminium corrode a lot and the steel corrode some.

At least that is how I have my metallurgy in my head currently. Only aluminium paste to a steel to aluminium joint. NO copper anywhere near it.

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Martin_R

· #11 · Mar 20, 2007

Dfib said:
Granted I know very little bout metallurgy,

Same here and even my rules of thumb might be a bit dated and/or not apply here. Maybe someone a bit knowledgeable will explain this soon.

but if that is the case with copper, why would Triumph use copper gaskets on the exhaust ports?

Because they are cheap and maintain the seal well under heat and Triumph factory likes all things cheap?

I guess this link is close enough to what I ment:
http://www.textronfasteningsystems.com/eng_tools_f/galv_corr.html
The further away the two metals are on the table the more likely the galvanic corrosion.

Now that I refreshed my memory a bit more, I think the anode-cathode size ratio played some role in this also, so the aluminium block being large and copper gasket small...humm... yes, maybe it's best to wait for the explanation from someone who actually knows what they are talking about.
;D

Until then, I am sticking to my aluminium based thread lube.

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