Hi Guys

+8 1989 V8 Rover engine, Holley carbs fitted; no mogs; rad grille clear of badges etc.

I fill rad with 50/50 antifreeze and distilled water; new stat fitted; engine flushed thru 2ce.

Get into traffic and kenlowe kicks in....temp goes thru roof.

After 30-miles or son header tank of rad is empty - takes 1-2 litres to fill....expansion bottle no change in level

Suggestion as to problem please.