Will radiator in diferent size/shape/material be implented?
And ofc wather temperature witch will influence MTBF.
Same could be done with oil temp and coolers 
This could be implented in the weight, and a limitation of the coolers size regarding what the engine is buildt for(race car/smal eco car/truck/stationary), would be fun to have the option of air cooled also, to have the option for low weight, but poor cooling 
This gives the opertunity for cooling of turbo’s also, oil/water/both
Edit: added coolers size for clarification