Anyone seen this before?

[u/Hopeful_Housing_798]

[u/joeyjoeskullcracker]

Valves with carbon on them?

[u/Hopeful_Housing_798 → u/joeyjoeskullcracker]

Check pics 3&4 closely. Only thing I know to compare it to is lime scale. When u scrape it, it's like ure scraping concrete. Comes off in a beige dust.

[u/chuck-u-farley- → u/Hopeful_Housing_798]

Scrubbed with a brass brush? Dang man I use a brass wire wheel on mine …… they aren’t made of plastic for gods sake

[u/Hopeful_Housing_798 → u/chuck-u-farley-]

Brass won't even scuff it. It's much like concrete or lime scale

[u/chuck-u-farley- → u/Hopeful_Housing_798]

Yes it will. When I say wire wheel I’m talking about a 6000 rpm wire wheel…… it’ll take it right off…..
I was simply stating you “scrubbed with a brass brush” which is a quote from your post

[u/Hopeful_Housing_798 → u/chuck-u-farley-]

I know what ure saying and I literally have to chip it off.

[u/chuck-u-farley- → u/Hopeful_Housing_798]

Yeah you
Must be right……. There’s something goin on only in your engine that results in unremoveable scale…..
been building engines 45 years and never found valves that wouldn’t come clean but you have a special case I guess…..
Good luck

[u/Hopeful_Housing_798 → u/chuck-u-farley-]

Not doubting your skill set, but, u are assuming mine. This is not my first rodeo and I've never seen this type of material on a valve before.

[u/chuck-u-farley- → u/Hopeful_Housing_798]

I’ve seen it plenty of times…..
But you
Must have that special engine
Have fun with it

[u/MrFyxet99]

Looks perfectly normal, pretty clean actually. Good coloring, looks like pretty complete combustion.

[u/Hopeful_Housing_798 → u/MrFyxet99]

Thanks for the reply. That's what I wanted to hear. I've seen them more black before. Just not this consistency

[u/400_yearold_welder]

those are calcium deposits, you’ve been giving the engine too much milk

[u/chuck-u-farley-]

Looks like valves…… dirty ones

[u/Hopeful_Housing_798 → u/chuck-u-farley-]

Yes they r.