The update on this from our learned Members here is that there is the potential for this same failure in all Ls400 models
However, thankfully, there’s never yet been a report of this ever happening ……, on here anyway …… that I have come across
The Ls400 set-up must surely be built of more robust materials ……. mines on 248k miles and no signs yet …… touch wood
The update on my 2006 Honda Legend is confirming this same problem and my car mechanic guy is trying to source a replacement radiator ….. but challenging …… only 286? Of this model sold in the UK …… then full drain down of the gearbox oil whatever and then hopefully back for another 149k miles of blissful stress free ownership 😄
Malc