This is something I highly recommend: I have not seen this anywhere, but isn't it obvious??? The timing chain MUST be in the very same position afterwards as it was before. If you are just one tooth out, the engine does not run perfect anymore, if you are out 2-3 teeth, you are likely to kill your engine, as the X308 has an interference engine, i.e. pistons and valves occupy the SAME space, just not at the same time - unless of course you mess up the timing. The result would be bent valves. SO I