Originally Posted by scotricker
... The fan is about 2" away from the radiator and seems to be in the center, although it is low. ...
that 2" is your problem, the fan must be within 1/2 - 3/4" and blade ends should not be close to the bottom [hottest water in at the top, needs best air flow] - otherwise you need a different pump configuration or a shroud

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 & Rust-a-holics Unanimous parking lot