Is it only on 1 head and are all the cylinders effected or just one?

I know you had Oil pressure problems

 

Just this cylinder, the rest are practically new. I was just running a rag over and getting the carbon and noticed it. I have seen people with same issue but on gasket area and they use jb weld to fill them sand. This is where piston hits, my guess is it will fill with carbon again. All internals will be brand new when put together. Ya I think there was an oiling issue because I seized that cam bearing. This cylinder was number seven.

 

That's usually what you see when hard debris goes through the engine or from detonation. but usually you see it on more than 1 cylinder as well as the pistons when it's detonation.

 

I don’t have the pistons anymore I sold them. Or else I would look to see if there was any damage it. I remember seeing a piston with a stress fracture but won’t know which cylinder. I guess since I am running all new internals it’s not much to worry about, no sense milling whole head for that one spot that will get covered it carbon. Figured I would get some opinions

 

It will be a hot spot for detonation issues, especially on that cylinder. I would have it fixed. A good welder can add some material and youll want it decked so its flat.

 

Going to take that head with me when I pick up my engine. Going to see what machine shop says about it, if its of concern then I can just leave it there with them.

 

I was able to pick up the gouging until now on the screen...

Wait, you said folks fill those with JB weld? Epoxy wouldn't hold up the heat, I don't think. I know they have a high temperature jB weld, but even that one wouldn't probably live long.

Good call in having the machine shop take a look at them.

 

No you can not JB weld anything inside the combustion chamber area. It will not last.

People use it to restore the deck surface on other area's but in my opinion that is not the correct way to fix it.

 

Google says the internal temperature of an internal combustion engine is 4500 degrees Fahrenheit! That must be maybe like the instaneous temperature because the melting point of aluminum is aluminum is around 1,200 *F

Must be due to the thermodynamics and heat conductivity of aluminum. 🤔🤷

Either way, welding is probably the right way to fix it.

 

It's not just the temperatures, but the pressures within the cylinder too... That's why when things go south, they do so in such a spectacular fashion...
They can reach those temperatures at the flame front how ever, there are other factors too such as Fuel, Compression, Timing and so on that go into it as well.