Yes I have checked the wiki but it doesn't jump out at me, so what to use? The engine I have opened up for rebuild seems to have a yellow tacky compound that looks suspiciously like Wellseal, but I just thought I'd check first
I also intend to get quantity of special oil pump sealing nuts in from our supplier if anyone's interested, as I'll be damned if I'm paying £2.50 each

+ vat + post + pack for 4 poxy nuts from Heritage

1985 Oettinger 3.2 Caravelle RHD syncro twin slider. SA Microbus bumpers, duplex winch system, ARC 7X15 period alloys