Find a Frostheater write up here with description/pictures. It's 3/4'' OD, front of engine compartment, driver's side, low on the block. Beyond that I don't recall much.
Jetta Wagon TDI 2K3 Silver, software EGR duty cycle mod, fuel pick-up drilled, FrostHeater, drilled coolant level connector, HiddenHitch, Panzer plate, Nokian Hakkapeliita snows, Michelin OEM summers, 165K+ miles going strong tornado-tough. Jason T. Daniels Is my 55 mpg guru.