Andy1

On my conversion, the LS1 intake is turned around facing and the bell housing. The steam vent pipe is of course at the front. I was going to simply leave it there since that placement is at the correct end of the flow of water in the heades before going to the exist side of the water pump. I need to make some special brackets and find that the steam vent crossover pipe is right in the way. So something must be done.

Some claim it doesn't matter which end of the heads the steam vents can be placed, but I wonder if this has indeed been tested by someone. This would be the easiest and cleanest solution, since I can simply swap ends. If there is any doubt, then I would rather leave the vent at the front. Has anyone re-configured the crossover pipe? Perhaps remove the pipe and?? What was your solution? Photo's would of course be nice.

Many thanks,

Andy1

gtpvette

iTrader: (2)

Andy,,,
I swap the intake on my car also,,, but leaving the tube in the front works OK for me. That said,,, check out LS1HowTo,,, the LS6 intake swap. The author changes the setup to two 2001+ tubes. It looks as if the orientation is different in the front,,, that is the radiator connection sides. Don;t know if that will solve your problem with the brackets.


see: http://www.ls1howto.com/howto/geniii...//IMAGE011.jpg

Hope this helps....

Fred

THE_SUPRA

^ not to jack the thread, but wow bad *** looking car

v-8

x2 sorry for jacking the thread but wtf is that?

gtpvette

iTrader: (2)

That is a picture of the factory car,,,, mine is still just a pile of parts. Take a look at

http://www.factoryfive.com

Andy1

Fred,

Since I only have my 2001 as a reference, it only vents the front of the heads. The rears are what appears to be blank bolt on factory fittings (without the tubes). Apparently GM decided venting is not necessary in the rear, ergo my concern about moving them.

That your GTM?

Andy1

TJ

iTrader: (10)

if the radiator was on the firewall, they would have been vented in the back and blocked in the front. they are only placed in the front for convenience, IMO.
id vent which side you could, unless its documented your motor is gonna overheat if not vented in the front.
good luck.

67RSCamaroVette

iTrader: (63)

we do it the stock position in our racecars, toward the water pump.

LS1Cobra

I temporarily blocked my steam line to start my engine up the other day. When it got up the operating temp I started to see steam coming out between the intake and the passenger side's head. I was scratching my head and was wondering wtf is going on. Do I have a gasket problem with this suppose to be new motor? Later I reallized that it was steam coming out. After I connect the steam line to the radiator it was gone. yes it's in the front because you need to run the vent line to the radiator.

ls1_chevelle

iTrader: (9)

You do not want to plug that line. Its to get rid of built up gas/pressure in the tops of your heads. If that hot gas is not moved out(air bubbles) then your fron 2 cylinders will run hotter then the others.

-Matt

67pete

The steam vents were put in the front because that is the highest point, engine slanted down at the rear, so which ever end is the highest point should be the end you use.

Andy1

This does bring up an interesting point. As my conversion is a mid-engine application, the motor will sit flat/level so perhaps I should run the old style venting that attaches to both ends.

Anyone have a set of the earlier style vent lines that vent both ends of the heads that they're willing to part with?

Thanks,
Andy1

Andy1

This does bring up an interesting point. As my conversion is a mid-engine application, the motor will sit flat/level so perhaps I should run the old style venting that attaches to both ends.

Anyone have a set of the earlier style vent lines that vent both ends of the heads that they're willing to part with?

Thanks,
Andy1

LS1Cobra

You don't need no hi point for this if you hook the steam line to an adaptor in the radiator hose. when the water flow thru the hose it will suck out the steam.

67pete

Actually, no it won't suck it out if it's not vented in the highest spot!

shifty`

iTrader: (3)

Here's a question I haven't seen answered:

Does it matter if you run the steam line from the vent to the top or bottom of the radiator?

I am looking at replacing my radiator petcock (bottom drive side corner) with a 1/4 NPT w/90º to 1/4 tube out adapter, and I was going to run from bottom of radiator up to steam vent.

Bad idea? Does it matter?

LS1-450

iTrader: (33)

There are many of use who vent both ends. Mine's done w/ 5/16" fuel line.
The rear head ports are connected together & then teed to the front head ports which are also connected together. From there, the line is teed to the TOP of the radiator.

under pressure

iTrader: (13)

Can I drill and tap the factory block off to create a steam line?

67pete

Yes, tap the steam line in at the top side of the radiator, as that is usually the low pressure area in the coolant system.

shifty`

iTrader: (3)

Ok, so it's a bad idea to tap from the bottom, so re-using the petcock = bad, eh?