Update on this post for anyone who is interested. I fixed the problem
Replaced radiator with an aftermarket one $350 AUD including postage ( suspect the original one was damaged as had coolant stains, not alot but some )
Bought a BUDS 2 unit with a 1 year dealer $1000 AUD
went thru the...
Gday ST
I have the same issues with my HD8 2017.Seems like there is air the the system it has purged out of the coolant tank twice. Approx 3 litres once and half a litre the other. I have found leaks under the throttle body (think its the throttle body ) but to tighten them all up you need...