ok the line come from the back of the head can i just cap it?

 

Are you talking about the steam line on the LT1???? If so, its not recommended..

 

No, I believe it gets tapped into the lower rad hose. I have to do the same thing soon. I may make hard lines for my rad tho.

Jay

 

I have always heard it is recommended to tap into the upper hose. Thats where mine is, i bought the recommended adapter from jagsthatrun

 

Ahh sorry maybe I have it backwards.

Jay

 

has anyone capped it? does it run hot?

 

I dont think its a good idea, bc i think the coolent will get stuck an heat up.

Jay

 

Those are the cylinder head vapor evacuation lines typical of the LT1 reverse cooling feature. Cooling the head first, then the block ("reverse cooling". The problem is some of the water_glycol will get to critical boiling and cause a vapor insulation of the head internal cooling surface. Resulting in reduced, and, low heat transfer due to vapor insulation. Then, detonation can happen, cylinder hot spots. Evans cooling (evancooling.com) was contracted by gm to develop the cooling system, and, they were sort-of riped off, but, their design worked. Gm used it. Smokie Yunik (sp?) was the first to cool the gm head 1st, and, it was his idea. The line returns vapor to the cold side of the gm designed Rad. I have converted to Evans NPG. Ice cold. B.

 

My vent tube goes directly into my coolant resevoir. If you are going to get steam in the system, that seems to be the place you would want it.

That's the stock design for the corvette, I'm not sure what the camaro does.

 

If the steam pipe is routed to the resevoir it will pump coolant into the resevoir

 

so it mainly just vapors? so if i route it to my overflow container it will bo ok?

 

That's exactly what happens. There is also a small vent tube on the top of the radiator that T's into this line before it goes into the coolant reservoir.

 

NO!!! It will flow coolant out of it, you need to keep the coolant inside the system. Its kind of like a burp tube, if the coolant boils inside the engine it goes up into the heads and since the coolant flow is down at that point it kind of gets stuck in there so they put a small exiting flow of coolant out of the back of the heads to cary away any bubbles.

If you route it to the coolant storage resevoir(not to be confused with your overflow resevoir) then the bubbles will make it to the top of the resevoir and be allowed to cool, but are not caught in the coolant stream displacing coolant any longer, and still in the closed coolant system.

 

ya i meant the stock overflow resevoir! "the plastic container under the battery"

 

NO This is actually the air bleed line. It has continual coolant flowing through it. It is the high point in the engine, so thats how the air bleed out. If you cap it, you will have air in your engine. If you run this to the overflow, it will fill up and pour onto the ground. I has to go back to the radiatior.