OK, my mechanical know-how is somewhat limited, so I have a few questions about my rebuilt engine.<br /><br />This spring, I installed a "Rebuilt" OMC/(Chevy 350) 5.7 litre engine. This engine was professionlly rebuilt by National Machined Engine company in Lincoln Park, MI (its a well known engine/speed shop in this area).<br /><br />After about 3-4 hours on the engine, I noticed that white smoke comes out if I goose the engine quickly, and when I first start the engine (and it smells like oil).<br /><br />Obviously, oil is getting into the cylinders somehow. They told me the break-in period should be about 6 hours, and I have been taking it easy on the engine thus far. I changed the oil after about 3 hours (and thats when the problem became noticable). I used Delo 400 sae30, and Purolator PureOne filter.<br /><br />I did notice that on the back port-side head, there is a small about of oil, which looks like it is leaking from the cylinder head out (very small amount) and the oil level is good. (I guess I need to check the cylinder head bolts?)<br /><br />1) Could oil be leaking from the head into the cylinder and burning?<br /><br />2) Is this just normal until everything seats in together?<br /><br />3) What tests should I do to see if I have an internal problem?<br /><br />4) Does it sound like a leaking valve seal or piston ring?<br /><br />I do have a two year warranty on the rebuild engine, however, being in a 29' boat makes it a little harder to get it back to the engine shop for service.<br /><br />Thanks for any/all advice<br /><br />-David
