I have been looking for about 3 months now to find what the diameter and length of the preheater hose, it didnt really make a difference not having one in the summertime, but in the first snow the car had a terible idle and took FOREVER to warm up, so i have given up on searching and want to see if anyone actually knows.

 

the preheater hose does not have much to do about engine heat. u may want to check ur thermostat