Just how concerned should I be!! At idle there is no visable smoke but when I rev it a little I am getting the light blue smoke out of the exhaust! I am hoping I just need time for the rings to seat. Engine has only run about 20minutes total so far. Engine was rebuilt by me, I used the same pistons, and had the bores honed at a machine shop as he said they did not need reboring. Engine was already at 30 over so it has been rebored at sometime in its life. Anyway, all new bearings, rings etc (yes they were 30 over and mic'd in spec. Heads were done at reputable machine shop. Smoke seems fairly uniform between the sides.