I am redoing my steam vents on the truck. i am curious what they really do. since they are so small i doubt they are really for cooling the heads. is there really steam in the top of the motor and is that why they are named steam vents?

 

They are for the air bubbles that collect at the top of the heads. The air bubbles cause hot spots, overheating, warping, ect. The steam vents catch the air bubbles and recirculate them out of the head.

 

oh ok that makes sense. so is the size of the line important? meaning -3 (3/16) or -4 (1/4) would really not make a difference right?

 

I don't think it would make a difference between those two sizes. Look through Atomic's thread. I think he has redone his a couple times. He runs all four corners to a little collector box.

 

Yea here is my current setup

Back returns to coolant tank



Front goes to radiator

 

ebay and summit

 

This is how I ran mine.

 

Just redid mine to this:

 

blackgmc is that blood all over your engine?

 

Actually i think it is. I remember cutting my finger really bad during that install. It was really pouring out. I had a steady stream going.