This video is the first on a series with the aim of solving cooling system problems on the V8 and V12 Models, including the E31, E32, E38 and E39. The same system is used on most BMW models up to the inclusion of electric water pumps.
produced by Timm, thanks

https://www.youtube.com/watch?time_c...&v=XGIk8IXSGIE

more from Timm here https://www.youtube.com/channel/UCKi...h_6NR7gaaaFe-g

and of course his website, which also includes E32 repairs http://www.meeknet.co.uk/e38/