the spring keeps the valve closed, the push overcomes the spring pressure .... take a look at the pretty pictures in your shop manual .... you do have one of those?

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