I had a mulfab ally rad fitted earlier this year to my plus 8 which allways ran very hot and sometimes boiled up when stuck in traffic on a hot sunny day. Since having the new mulfab rad and 14" fan fitted, the problem has gone away,! Also had Evans waterless coolant put in the system. Runs like a dream now. Even with the hot weather we have had recently 28C, the engine runs at just about 100c even in traffic. Really pleased so far.