Take a look at these exhuast valve's

[Quick Cal]

So I drop the exhaust to repair a broken flange bolt. I'm looking at the valve's and 3 of them are all sooty and black. I guess that's to be expected. Should I do any thing about that, or is it normal.

But. On #2 cylinder, it is very white looking. What does that mean. I haven't got my head in there far enough to tell if it's corrosion or not.

Please advise. Thanks.

[7981GS]

That is what they should look like.

Eric

[Quick Cal]

So you're saying the white one is correct??

So then should I try to do anything to the black one's.

[Guest]

What do the plugs look like?

[Flyboy]

Look ok to me, black is a bit rich, exhaust valves should be tan to off white, they run at 1450 degrees C bugger all survives those temps, least of all soot, which is what the black stuff is.

[razor02097]

I'm going to echo the others and say the white is normal