These 4/4 series one morgans are very special cars and the thermo syphon system without a water pump is simple and effective when all is ok. Remember to allow a little expansion in the top of the radiator and antifreeze increases the boiling temperature 2015-04-07 08.14.11 by Robert & Ali Davies, on Flickr

Morgans 1934 MX, 1947 Series 1, 1956 +4 TR4, 2000 +4 T16
Triumph Herald 1969 13/60
Morris 1970