THATS EXACTLY LIKE MINE DID JUST before the cracked block let go! it was a 2 month old recon unit ran sweet as a nut, but kept getting a bit hot, but not overheat, no oil in water etc etc etc, then driving along it just started pouring smoke out the back when it finally let go.
no matter what you do do NOT go to v8 developments in lincolnshireto sort it out.