maybe yer filling it too full, should be 1/2-1" below the neck opening - the noise will likely be the water coming from the engine as the stat opens and the hot water meets cold
"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
