On my '94, the driver's side and passenger's side coolant hoses that connect to the throttle body are connected to the main coolant lines through "T" fittings. The one on the driver's side connects to the upper radiator hoses at a "T" fitting, and the passenger's side connects at a "T" fitting in the hose coming from the coolant reservoir in front of the windshield.

Now my question is this: rather than coupling the two throttle body hoses together like most people do, I'd like to just remove those hoses alltogether and cap the outlete on the "T" fittings. What can I use to cap these fittings? Or can I buy regular ABS hose couplings to put in place of the two existing "T" fittings?

I think this would be a much cleaner execution of this mod, and would serve to eliminate about 4 feet of tubing from the engine bay.

Anyone done this?

 

Wouldn't that block up your heat to the heater core? Pretty sure the passenger side hose goes to the heater core. Then again I'm not sure about that either....

 

I didn't couple mine I just got a longer hose less places to have a leak

 

I think the hose routing is a little different on a '92.

The passenger side hose to the throttle body just tees off of the hose running from the reservoir to the water pump.

 

I thought about that, but the passenger's side hose is like 3/4" i.d., and the driver's side is 1/2" i.d. I would think you'd need a coupler in there somewhere.

 

Check out the picture on my website, under simple C4 mods. You can just shorten the hose coming off the T and route it to the inlet on the passenger side cylinder head.

 

Unfortunately, the car on your website is a '95, and the hose routing is completely different from my '94.

The "T" I'm referring to is halfway along the lowest hose exiting the coolant reservoir tank that connects to the bottom of the water pump on the passenger side of the car. The other "T" is halfway along the upper radiator hose on the driver's side of the car. Yes, there are actually two short upper radiator hoses connected halfway by a "T" fitting rather than one long hose. Screwed up, yes.

 

Your prob right my 88 has the same size hose

 

Your probably right there too. Ill have to look at that next time cause I checked mine and I think it goes right into the heater core.

Hey did you ever figure out the TB gasket stuff?

I know this sounds crazy but you think your routing on those hoses in unique cause you have manual AC/Heat system?

 

I think the throttle body gasket kit they have at Autozone for the L98 has the gaskets for the LT1 in it too, or they are the same. I looked at one of the kits and the upper "clean air" gasket is identical to the one on my throttle body.

I don't think the hose routing has anything to do with the manual AC/Heat, it's just funky on '94 cars (maybe '93 also). If you do a parts search on the heater and radiator hoses, they are the same for all '94 cars.

 

I thought about doing the same thing, but I couldn't find anywhere to buy metal double ended hose nipples or hose splice. I didn't want to use plastic. If you can find the metal ones the right length and diameter let me know where you got them.

 

Right now mine are just caped off with a short hose, plug and some hose clamps. It looks like poo, so I'm going to take some aluminum that I have setting around and turn up some pieces to replace the "T" fittings. It should only take a few hours to make and polish.

 

Jay:
On my '94, I got an 3/4" nipple from Ace Hardware, installed it on passenger side. Got an new top radiator hose (1995 version), the 95's do not have an "T" fitting. Very clean!
RTR(roll tide roll)

 

On my 92, I turned the "T" on the upper radiator hose around so I could run a heater hose across the radiator shroud and coupled it to the other hose coming off the TB. Then I put rubber caps on the TB nipples. I bought that TB bypass kit and it had a fitting designed to couple the 2 different sized hoses. I even got fancy and covered the hoses with stainless.

 

I like that! Looks pretty good.

 

Well, crap. That's what I should have done earlier this year when I bought two brand new upper radiator hoses!

 

Anyone ever have a problem with TB icing after doing the bypass?

I live in a colder climate where in the spring and fall I may be driving the Vette in below freezing temps. I haven't done the bypass mod for this reason.

 

post pic's when your done

 

i have a '94 also...

I removed the T's on both passenger and driver side hoses when I did my TB-bypass. I went to OSH (hardware) and found a couple of metal sleeves that fit. I didn't use the pastic ones because I didn't like the fact that the plastic was fairly thick and so had smaller diameter hole.

One metal sleeve was already the right size and length (I think that's the bigger diameter one of the two) which, if memory serves, goes on the driver side hose; The other, for the passenger side, I found a brass sleeve about 6inches long that's used for piping, etc..The thickness was good and the hole was nice size. I merely cut that down to the length I needed.

I remembered also that the driver-side hose was too short (about an inch) to get from the tstat housing to the radiator via the new connector. I had a new radiator hose for my '94 TransAm sitting on the shelf (well, no longer have the TA) and hacked a portion of that, which seems to fit fine...

if you want pics of mine, let me know. I'll see if I can get some tonight after work.

I've also been concerned that most people that post this mod merely connected the T's together, which would allow some coolant to flow thru all the time, since this line bypasses the tstat. Logically, I couldn't see how my setup will interfere with the main cooling system so I went ahead and did it. I have a 160 tstat and programmed the PCM for it, and so far have not seen any problems with cooling, even on the hottest days.

 

Great info there, Gab. After going to a couple of parts places, I've realized I'm going to have to go the hardware store metal pipe route. Do you remember what kind of pipe (its intended use) you first tried between the two upper radiator hoses (driver's side)? I've found galvanized threaded pipe in 1 1/4" size, but it's awfully thick and heavy. Seems like you could get a short piece of steel conduit or something, rather than having to buy the 10 ft they sell at Home Depot.

Actually, I did find a couple of places that make the connectors for radiator hoses, including this place http://www.streetrodstuff.com/Products/1177/

But $30 for a short metal tube? I don't think so.

Here's another site:
http://www.jagsthatrun.com/Pages/Par...plice-Kit.html

If you look at the rest of the site, they actually have the "T" fittings that come stock on our cars. Wonder where they get them?