just removed the head of my e36 325i and the gasket is like new ,there is no clean valves or shiny tops of pistons or any visable cracks ,all the valves are good and everything looks fine but there was no compression on number 6 and it was using water ,even the oil was still gold in colour ,any ideas as to what could be causing the compression loss before it goes to teeside motor factors to be pressure tested cheers