Slow progress getting it back on road. All parts arrived to be able to fully re-assemble, but noticed that there was evidence of leaking from one of the plenum oil return hoses. Being that all 3 were original 1999 date coded parts along with the radiator, hoses and fan clutch I decided to renew all of these given their age and reluctance to have to re-visit working on this engine any time soon. So another week or 2 and those parts should arrive. In the mean time i’ve fitted all new idler pulleys, new gen bmw alternator, replaced the ac pulley clutch bearing and re-installed the bank 1 upper chain cover.