RNation0001

iTrader: (2)

ok got my 5.3 in for my car and im going to put the ls1 intake on. i test fit it and there is what im guessing is a coolant line that isright up against the intake. when i get everything together what do i do with this line. do i bend it outand hook something to it?

RNation0001

iTrader: (2)

comeon someone has to have some input on this

50adrod

iTrader: (1)

that is the coolant line that goes to the throttle body on the truck

RNation0001

iTrader: (2)

so now that im puttin an ls1 intake on it what do i do with it? cap it off or run it to the ls1 throttle body

50adrod

iTrader: (1)

it is also called the steam line and goes from the throttle back to the radiator, some cap it off without any problems and others say it has to be used.

themonkeyman89

iTrader: (2)

I see you don't have the throttle body on the intake yet, have you tried fitting it with the TB on there? Because 98% of the time it will not, without modifying the waterpump. This issue has been covered MANY times, try a search, it will detail it clearly with what you need to swap to make it work. In a nutshell, you need a new accessory bracket (car style) and a car waterpump.

bjamick

iTrader: (31)

You're water pump can be used, you just need to turn it outward. Then make a precise dent in it with a hammer, and you're done . Also cap off that line, it's not needed.

garys 68

iTrader: (1)

I did the same thing, LS1 intake on LQ motor. I kept that steam vent by just bending it outward a little bit. I know others have capped it off and had no problems, but I figured GM put it there for some reason. I tapped a spot in my water pump and connected it to a fitting there, but you can connect it anywhere on the high pressure side of the cooling system.

extremetoy

iTrader: (17)

truck accessories and waterpump will work... i used the truck water pump but the filler neck needs to be either rotated or cut so it is at an angle towards the pass fender... or get a newer truck water pump and it is already molded at an angle for ya... thats the steam vent line like earlier stated some say its needed others say its not. its ran through the throttle body to heat it up faster or something but many bypass it or plug it.

NemeSS

iTrader: (127)

bend and direct it so dont interfere with your manifold or cut it down and route your hose anywhere u need it to go. do not kink it when bending
DO NOT cap off that steam line.
plumb into your radiator or hoses.
u can cap off the heater hoses if not using

endrnet

I'm in the process of doing effectively the same thing with a 5.3L truck motor, except I went F-Body front drive.

I have this same fitting that I'll have to cut or bend. Is this a pressure fitting? Which side of the water pump should I plumb this to? Also, just for clarification, the top of the water pump is pressure out to radiator, bottom where the thermostat is is return?

garys 68

iTrader: (1)

The 1/4" steam vent fitting is pressurized. I dont think it matters where it's plumbed to. I'm guessing the only time it's needed would be at a very hot shutoff, where steam could form in the heads without water circulating.
Correct on the water pump in/out orientation.