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

Bill


Moved over to the Passing Lane

"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