Originally Posted by Chris6272

I have the first gen. 3.5 TT and I installed a catch can system that included a smaller driver's side can. Worked just as designed for 3 seasons out of the year. In very cold weather the small driver's side can collects about 99% water and a lot of it quite quickly requiring you to drain that can weekly. During an extremely cold stretch(single digits), my oil light came on while driving up a long hill. Mind you, this was just 2 days after I emptied both cans. I only had a short drive but upon returning home, I opened my hood and oil was EVERYWHERE on my engine and dripping onto the driveway. The truck was 4 quarts LOW! The smaller DS can had filled with mostly water and froze solid causing a vacuum blockage that purged the oil from the engine through the opposite side valve cover gasket. I immediately removed the catch can system and returned the truck to stock. As I understand it, they've redesigned that system by deleting that can and it now recirculates that "vapor" directly into the DS valve cover. So why bother?! If you have a Gen. Two 3.5 TT, you have a dual delivery system for fuel that Ford designed to eliminate the problems of the recirculated oil build up in the Gen. Ones. If I knew then what I know now I'd be $450 richer...