Firstly I have used the search function but couldn't find the answers i was after (im sure someone will now link a thread with all the answers to lifes questions below) so i apologies in advance for that

I will in the near future be stripping down and rebuilding my engine (1.9 DG)
What i would like too know is, what need replacing, whats within tolerance and what to change whilst im in there!
so where can i find measurements of the internals and there accepted tolerance
also any other advice of what too look for damage wise etc
reason for rebuild is negative results from compression testing