Ok, here is the low down. I had to rebuild the motor due to a spun bearing back in 8/08. After going over my options I decided the best choice was to do an OEM rebuild with a few aftermarket parts. Here is the build: B18c piston set w/ rings 81.5mm B18c engine gasket set B18c OEM oil pump B18c water pump B18c timing belt ARP head stud kit ACL bearing set w/ thrust Machining - bore, hone, polish Head resurface Hondata S300 Hondata intake manifold gasket This build was based to be a street driven car w/ boost to be added after I got the suspension, braking, and other parts that needed replacing. I got this rebuild back and had noticed that the motor was eating oil. At the time I did not think nothing of it because I figured I would need to break it in and then assess after about 2k miles. Was I wrong, less than 3 months later the motor began to knock. This I learned was due to the motor eating about a quart of oil a week and the bearings had begun to warp due to not realizing the severity of the oil issue. Keep in mind there was no oil leaking on the ground, as I would have noticed this quickly. There was some leakage on the head, but it didn't seem like a quart a week. So I get the bearings switched out and discuss this oil leak problem with my mechanic. After a couple more months I begin to realize that at high RPMs (5k & up) the exhaust would smoke and once I shifted it would blow out the smoke. Again I directed this to my mechanics attention. I continued to keep an eye on the oil, but at $7 a piece for Castrol full synthetic it becomes a problem. So, 3 weeks ago I finally set up an date for the car go into the shop to check this out, plus I chose my suspension (function & form) and was to have a water temp & oil pressure gauge installed. A week later I am taking my Sunday cruise and on the way home I hear a rattling in the motor and then a load bang. This I now assume was a rod bolt coming loose and it put a crack in my block. Which virtually renders the motor useless now. Now I am just looking to get various opinions on the motor or what the cause of the issue may or could have been? This car was driven daily and as one could expect had some hard driving done, but nothing to over the top.