Cooling for 1.8t conversion Post Posted 26 August 2018, 2:11 PM #1605238 (In Topic #218724) Spud o Settling In After info on radiator type, ie topfill radiator or exspansion tank which is better Post Posted 26 August 2018, 3:05 PM #1605245 abfmk1 Old Timer expansion is better, fit and forget, topfill dosnt allow for expansion and will lose some coolant when it gets hot… 0 guests and 0 members have just viewed this: None. Forum home Engines