406chvycamaro

iTrader: (7)

Im running an lq4 short block with ls6 top end. The back 2 steam lines are capped due to it being an ls6 setup. I was curious if anybody is running with the front 2 steam ports blocked Off as well. Any help is appreciated

BOXCHEV

iTrader: (3)

No, do not block off the two front ports.

406chvycamaro

iTrader: (7)

I currently have it connected with a t fitting into my overflow catch can hose that comes straight off the top of the radiator. The catch can has a small factory vent hole on it. When I took it around the block it seemed to be spraying coolant out of this vent hole. Didn't know if it had anything to do with the steam hose. Any ideas what could be causing this?

i r teh noobz

iTrader: (4)

Your steam line needs to be connected to the pressurized side of the cooling system. Many people tap a fitting in the top of the water pump or the upper radiator hose. I run a pressurized surge tank that has a steam line provision.

It sounds like you have your steam line hooked to an old-style overflow hose, which will allow coolant to simple pour on the ground as you drive.

406chvycamaro

iTrader: (7)

Should you pull waterpump off to tap it or is it possible to do it on the vehicle

406chvycamaro

iTrader: (7)

If I plumb the steam vent into the upper radiator hose can I still run a vented overflow tank?

74modified

Yes
You can run into the upper rad hose, return heater hose, radiator tank fitting, or tap the pump, and your radiator cap will regulate flow into the overflow tank. I think having to drill and tap a pump is a dumb idea just because I might go out of town and what would I do if the pump went out. I use a pressure surge tank with a steam line fitting.

Doug G

I tapped the T-stat gooseneck for my vent line.

406chvycamaro

iTrader: (7)

Thanks to all that replied

i r teh noobz

iTrader: (4)

I drilled my pump for a temp sender on the car. Its aluminum and drills very easily. The coolant inside can be used to flush out the majority of the shavings. Just squeeze one of the hoses a couple times when you're done drilling.

BigEd_72455

iTrader: (7)

****, I never thought of that!! And I just spent $15 on a cylinder head fitting adapter.

sweetk30

must vent steam lines .

also has to stay on pressure side of cooling system.

and here is a pic of my drill / tap in truck h20 pump.

I pulled the pump since the gaskets are common fail point. and sure mine were ready to pop .