vinegar is VERY corrosive, if you use it make sure you flush well, repeatedly .... yes, a hot engine will flush better, and there are a number of flushing compounds available at auto stores
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
