This is an SOS to anyone who can shed some light on my hair tearing>problem on my recently aquired 635csi BM auto. Here is the story..>bought car which hasnt been in use much over last few months. The>exhaust backbox was damaged in transit. Battery was flat. I charged the>battery and started the car up, it ran fine although noisy due to>backbox needing replacing and it did idle funny at first (hunting>revs). I drove it up and down my road before parking back on the drive>(luckily) before it decided to stall. When i tried to start it again it>wouldnt and it sounded rougher as the engine turned over. Then>catastrope struck and from the engine bay came an almightly bang (like>a gun shot sound). After gathering up the nerve to try it again it>would just turn over but not start. Havent had the guts to touch it>since but I know that there is no visible damage to the engine from the>outside, ie no cracks, pistons poking through the block, no oil leaks>etc. Does anyone have any idea what could have happened? All comments>welcomed! Dan.