What would these dings be from inside engine block?

[Skip341977]

Okay new to this so bear with me. So I was replacing my oil pan gasket and my rear main seal I look up into the block should be number one cylinder and I see all these dings on the Block itself. I check piston rod ran my hand all in there and I didn't feel anything what could these things be?Or what are they from I also when starting up a straight-6 it's got a little Clank to it when it warms up it goes away and the noise is in same spot. Lmk what y'all think. Thanks

 

[jjvw]

What exactly are you seeing? If it is the rough surfaces compared to the smooth machined surfaces, that is the raw texture of sand casting. It's the same finish as the outside of the block.

 

[Skip341977]

Okay new to this so bear with me. So I was replacing my oil pan gasket and my rear main seal I look up into the block should be number one cylinder and I see all these dings on the Block itself. I check piston rod ran my hand all in there and I didn't feel anything what could these things be?Or what are they from I also when starting up a straight-6 it's got a little Clank to it when it warms up it goes away and the noise is in same spot. Lmk what y'all think. Thanks View attachment 56468 View attachment 56468 View attachment 56468

Okay on the last pic if you zoom in close you can see some dings about midway's right hand of the picture up by the piston let me see if I got some better pics but if you zoom in on it you can see the Shining dings almost like a piece of metal come loose or something got caught in between there

 

[Skip341977]

This one may show it a little better

 

[Jeepaholic]

I don't see anything out of the ordinary either. Just saw the last picture. Those are not in the cylinder wall, they are just from casting, been there since it was new.

 

[Skip341977]

Ok cool thanks fellas. Running good. No oil leaks. Think its mud time and maybe Bud time.