Biohazard
The good news is the valve seat area looks great, just carbon up from years of being run too easy with a leaking valve stem seal.
Seen lots of valves like that.
Techron couldn't stop it. SeaFoam wouldn't touch it. Scientists were unable to carbon-date it. It is the automotive archaeological find of our time.
Very happy with the shop I found. They're doing the aforementioned headwork and I'm going to put them down to bead-blast the intake manifold inside and out.
The good news is the valve seat area looks great, just carbon up from years of being run too easy with a leaking valve stem seal.
Seen lots of valves like that.
