[bjun]

Originally Posted by strat61caster

No. That is roughness from the casting process when they make the block, it's not worth the OEM's time to prep every block so it looks pretty.

Some examples:
http://www.mitsu-media.com/forums/sh...ad.php?t=14522

http://twinturbo.net/nissan/300zx/fo...et-Part-2.html

Oh sounds reasonable. I thought they were cracks when I was cleaning the leak today