Originally Posted by BIG CHEVY 3600
... What does the water do, activate the antifreeze?
the water is the heat transfer fluid - if the truck were not being used, draining the system would be the correct option, but as it will be run occasionally a proper coolant must be used, 100% antifreeze is not a coolant

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