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Discussion Starter #1
I have the intake off getting port work done and was looking down each runner today before it goes back together and saw this.

This is on #7 looking in from above.
Heads are aluminum GMPP BBC heads.

The spot is on the forward side, nearest to #5. It is the only one like it in any of the runners.
I can not get my fat finger down in there far enough to see if it is roughed up or not.

Crappy cell phone pic trying to shine a little LED flashlight down in there at the same time.


 

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Looks like the view I had a few weeks ago after Lasik surgery. Try another picture please!!
 

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Discussion Starter #4
Sorry, I will see if I can get a better one here in a minute.
On the left side of the wall it looks like a burn spot, like the aluminum was too hot in that one specific point.
 

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Discussion Starter #10
Yes small spot , sorry for the confusion.
Look like epoxy to you?

I was thinking a burn mark somehow?
 

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Looks like corrosion maybe a water leak ?

You might want to pressure test it before you put it back together
That's what I was thinking. Almost looks like it was molten at one point.
 
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