I know this is an old post, but thanks so much for ging to the trouble of writing all of this and including photos. Ended up doing it myself, and it took ages, but well worth it. I made the mistake of using cheap o-rings in the pulley tensioner bracket first time around - leaked like a sieve...
Thanks - pulley tensioner diagram very helpful in putting this all back together. Made the mistake of trying to use cheap crap o-rings first time around - leaked like a sieve. Got (overpriced!) genuine Holden o-rings - all sorted.
Thanks very much - I had knocked the plug loose and was getting an error, thermo fans on all the time, and engine a bit down on power. Easy fix!
Thanks again :-)