idrivemopar
Well-Known Member
So, I fired up my 340, just rebuilt, most likely only a couple of hours on her, the builder did the cam break in, told me to change out the break in oil when I get her running, and I did that, refilled with Brad Penn 10w 40, oil pressure looks good, middle of the dash gage, but there is a bit of a cloud of thin blue smoke coming out the tail pipe, seems to increase as the engine warms. Did not happen the other day when I was running her with straight pipes and the break in oil still in the motor. Now it has fresh oil and full exhaust. Is this maybe the rings have not fully seated? Its got Keith Black hypereutectic pistons.
Any thoughts?
Any thoughts?