Sorry for this post i have just about had enough. i have tried everything possible to get this process speeded up and still have no luck. Apparently the garage reckon i have opened a can of worms with Renault UK and France. It seems that they have modified the engine to have smaller outlet ports but have forgotten to increment the engine number. Not knowing much about engines i take it smaller outlet ports mean less power output (Captain?). If this is true it means that newer 172 have less power is that documented anywhere? They really dont have a clue what is going on! i just hope no one else needs an engine replacing in the near future cos you will be in for a wait.