GTA91

iTrader: (1)

Which ones do we use? I thought we use one of our stock ones and maybe a 4th gen v6 one too?? Anyone know? I've searched on here and can't find it... radiator hoses BTW.


thanks!

pskel350

i think i used a top hose for a 4th gen ls1....

i was told to use a gates 21505 for the bottom, which i got, and it fit like crap. i ended up just going through all the hoses at work to find one that fit. i can get the part number tomorrow. its a dayco hose i believe.

GTA91

iTrader: (1)

Please let me know on both for sure.

Thanks!

Ace

iTrader: (2)

i used my 92 one on the bottom and the 99 on the top.. both fit on the top but the 99 one tucked in better i didnt have the cooler on the top either

92CamaroLS1

Definatly let us know what you used for a lower radiator hose. I ghetto rigged one on there, and it works, but I dont need one more ghetto rigged part on my car .

GMTech

I used a '99 LS1 F-body lower hose, but had to reverse it to fit over the larger thirdgen radiator fitting. Also, reversing it made it clear the idler arm better.

MrDude_1

i went thru a HUGE hassle for the lower hose.


i wanted one that cleared everything with room to spare, fit good, and it had to have the stiff spring to keep the lower hose from collapsing.


after talking to StngKlr he helped me find one..


all the info you need is in this thread

https://www.thirdgen.org/techbb2/sho...=radiator+hose





i should update it with pics of the good hose installed..... fits and works GREAT.

MrDude_1

also btw, for the heater core:


they make heater hoses with a molded in 90* angle on one end... get them, and put the 90 on the firewall, that lets it JUST clear the coil pack, and then you can run them along the top of the "frame rail" and straight to the waterpump.


looks nice and clean.

GTA91

iTrader: (1)

Thanks guys. I got an upper 4th gen hose today and got home and it was nowhere right... they must've screwed up. I'll try again tomorrow. Then I got that Gates 21505 number crossed to another brand and got it and it didn't fit at all. I guess I'll try to get the actual Gates one tomorrow, or a 4th gen lower like GMTech suggested or try to use my stock lower. Sooner or later I'll get this figured out. How are you guys running your water hoses from the firewall? One is supposed to connect to the hard line on the "frame rail" and then where should it go? I'm assuming to the water pump, but there is two nipples on the water pump. Anyone have good pics of their install?? Let me know or post them.


Thanks!

*At least I did get the rest of me header bolts today and my 76" belt for my ASP pulley. Got my power steering all hooked up last night too. It's getting a little closer everyday.

MrDude_1

the upper 4thgen hose:
tell them you have a 99 to 02 camaro WITHOUT a powersteering cooler.
the hose, starting from the radiator: 90*, long straight section, roughly 30* bend, then a 90 ish toward the motor.


the lower hose:
you will have to trim it slightly to fit, but it fit really well. (this is off memory, so i might be off a bit) it does a 90 almost straight up off the radiator, turns back and to the side, goes flat across to the motor, then turns to meet the waterpump inlet.




the radiator hoses:

ditch the metal hardline.... you need to take it off.... 10mm bolts, and since the motor is in, its probly going to be a PITA.. lol.

get two heater hoses with molded 90s in one end... put the end with the 90s on the heater core, and the other ends goto the LS1 waterpump.

you can adapt the extra hole on your radiator for the throttlebody coolent connector, or you can plug it.

StngKlr

Yeah the lower hose I used has to be trimmed up quite a bit. The whole hose will not fit in there, so you have to trim it up. After many attempts trying suggested hoses and none working, I just walked through the back of a parts store and looked through all the hoses till I found the 21505 hose. Works good for me. Also the only descritpion they had for it was that it was supposed to be used on a 90's Ford V8, truck I'm assuming.

StngKlr

Found a pic. for ya. Man, its a little dirty in there.

GTA91

iTrader: (1)

I just got the 4th gen UPR and LWR hoses... look like they'll work. That Gates 21505 I had and I looked at another one today... are huge. They're openings are way too big too. Not sure how you guys got them clamped on and sealed tight??? Oh well, we'll see. Anyways, as for removing the hard line from the frame rail, why do that?? I'd rather have it than a rubber one. I kepy it and moved it over 1" or so to clear my Hawks LT headers. So neither of those 2 hoses from the firewall go to the radiator anymore?? What about that little valve thingy with the 2 inlets and 1 outlet and a vacuum line to it. What is that for? It's stock on our 3rd gens. Let me know. Also, just run the TB bypass/steam hose to the medium size port on the passenger side of the radiator?? Right?


Thanks for all the help, you guys rock!

Ace

iTrader: (2)

The black diverter valve is when you turn the heat on it opens the vaccuum to that valve and the water flows through the heater core You can keep it on there if you want or toss it and run it continiously through the core... you can keep the hardline pipes that run along the frame too just need a cycle of water thru the heater core to get heat

GMTech

GTA91,

Just remember, the fitting on the 3rd gen radiator are bigger then the 4th gen, so I had to "work" the upper hose to get it on my radiator.

And because the lower radiator was so much bigger then the 4thgen, I reversed the hose. The end that was "supposed" to go to the water pump, I put on the radiator and vice-versa. It seemed to clear the idler rather well. Again, it took some "work" to get it on the fitting.

As for the heater hoses, just make sure any bends you make are gradual. One of my hoses was bent to sharp and while driving became kinked. It just happened to be my return hose and the pressure build up popped my heater core.

GTA91

iTrader: (1)

Thanks for the tips guys. I have both 4th gen hoses and the top one went right on, I haven't messed with the bottom one yet. As for the heater core hoses, I think I'll just ditch that valve. You guys see anything wrong with that?

*Also, that TB bypass/steam hose goes to the spot on the radiator where the heater hoses used to go... right?


thanks soooooo much for this help!

GTA91

iTrader: (1)

Old post.... I ended up using stock upper and lower '02 fbody hoses. The top one went right on and I just had to use a little liquid soap on the bottom one to coax it on. They fit prefect and the bottom one clears the idler arm quite well!


*Now I just have to route my heater hoses!

StevenK

iTrader: (1)

Bringing this back because I need to know.

I tried teh whole 'ask for the non-PS top hose' thing, yeah, I got a 90 degree bend hose about a foot long, no way in hell that would have made it all the way across.

Ended up using the 90 bends and the cooler for now. Stock LS1 bottom hose worked as prescibed.

So now I got the throttle body hose, and its too short, what did you guys do there? Plus its a whole different size then the outlet on the radiator.

And of coarse, like 91GTA, I need to hook up the heater box.

So right now, I've got the upper and lower radiator hoses hooked up to the motor, and then water pump has nothing hooked up, and the throttle body hose is too short and the wrong size to hook up.

Pics would definitly be nice.

shr00m

iTrader: (2)

As far as the heater lines, the easiest is to go to the parts store and ask to see all the 3/4" and 5/8" with built in 90 degree bends. I wound up getting two that were really long. One was long enough to attach right to the pump and the other needed a 1' splice.

It's going to be tough if the engine's in, but possible. You can see them here run from the pump down the rail and going back to the core.

shr00m

iTrader: (2)

As far as the head vent, I found a 5/8" right angle with a 1/4" straight. I ran the head vent (I bypassed the TB) to the 1/4" side, put a plug on the 5/8" T, then ran 5/8" hose from the other side out to the port on the radiator. The radiator side is like 7/8" so it took a lot of soap to get it to slide on. It's just a vent so pressure isn't a concern.

I've seen others epoxy a nipple in the radiator hole and run a small hose into the head vent. I didn't want to trust epoxy, plus I thought a small line running across to the engine would look kind of silly.

Kevin D.

StevenK

iTrader: (1)

Thanks for the pics shroom!

So you didnt just hook a hose up to the existing metal lines, you completely replaced them all the way to the box?

shr00m

iTrader: (2)

Yup, much cleaner look. Plus I think the stock hardlines have a weird T in it that would have to be plugged..

Kevin D.

GTA91

iTrader: (1)

I'm still running that hard line on the "frame rail" and also running that "T" thing with the vacuum line to it. I think I'm gonna redo it like shr00m did with no hard line and no "T"... I've actually got a small water leak back at the hose that does a 180* bend out of the firewall and into the hard line. I'm probably gonna have to remove the passenger header to do all this but I need to anyways b/c that headers is rubbing the floor board and driving me nuts...

StevenK

iTrader: (1)

Can you explain the T and vacuum line stuff, I'm not understanding what your talking about.

GTA91

iTrader: (1)

Originally on our cars there are heater hoses running from the firewall to a 3 port valve thing with a vacuum line to it as well. I'm sure you know what I'm talking about.... originally one of those lines runs to the TB I believe and maybe one on to the radiator.

shr00m

iTrader: (2)

I was actually talking about the T in the hard line, but it's all part of the same system. The mushroom piece with the vacuum line bypasses the heater core. I had removed that way before the LS1 swap anyway.

Kevin D.

GTA91

iTrader: (1)

Yeah, it bypasses the heater core...what's the point of that?? I think I need to ditch mine and reroute some stuff...

StevenK

iTrader: (1)

I'll have to go look at it again, cause for some reason none of that is making sense.....lol

Either way, I'm sure once I'm actually looking at the car, this will all make sense. The big part was knowing the size of this stuff for when I go to the parts store, thanks again guys.