depends on the value of your thermostat, some motors with a 160* stat never will reach 180 - if it's a 180 or higher, shouldn't take long but will vary with the particular engine .... and don't trust your dash gauge, check in the rad with a good thermometer or use a laser thermometer to check various areas of the rad and engine

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