Originally Posted by Peter J
I had the Plus Six engine in a BMW M140. It has, in that fitting, two separate cooling systems, including 2 header tanks. One is for the intercooler and one for the engine. Does the Plus Six have that...?


Henry mentions 2 tanks for the Plus Four, just after 4’30 in this recent vid….

https://youtu.be/nGoOOxbSzQQ