lack of a fan shroud is most likely, if the fan isn't within about 1/2" of the rad, which it won't be unless you've moved the rad back

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