Ok, I didnt dissasemble the engine on my car, but stuck with the task of putting it all back. I need to finish off the coolant hose/heater core hose ect ect routing and have a few questions.

First, the outlet on the side of the rear iron goes to the inlet of the heater core correct?

Second, the outlet on the TOP of the rear iron goes to the T/B correct? If I eliminate this, will coolant still get to my turbo through the LIM?

Third, the inlet on the rear of the water pump housing is the inlet from the Heater core outlet correct? I know where the inlet from the turbo is and thats all done.

Pics are attached of the outlets/inlets in question. Thanks for the non flaming and informative answers.

 

1. Correct.
2. Correct. Turbo gets water from the rear rotor housing feeding the intake manifold and is right next to the air piece that feeds the cat.
3. Should come from the BAC if not mistakened. Been forever since seeing a stock one. The other heater core hose goes to the lower radiator portion.

 

so if Im running 2 front rotor housings, I Wont feed coolant to the mani, which in turn means I Wont feed water to the turbo?

 

Why would you do that?

 

Had 2 good front housings, 2 bad rears. No emissions so at the time of instal, saw no issue wit hthe exhaust port to the LIM not being there. Didnt think about the coolant feed to the LIM. (shrugs)

If thats the case, Ill feed the turbo from the T/B outlet on the top of the rear housing.

 

I had taken the BAC and all the TB mods so I ran the rear iron hose to the turbo, and for some reason the waterpump didn't have the rear inlet on it.

 

As far as i know, both the front and rear turbo rotor housings have the hole for the coolant passage to the LIM, its just that the LIM only has an opening for the rear one. however, you still need o-rings for both to keep coolant from soaking the gasket and leaking out.

There are 4 significant coolant loops on a TII:

First is the thermostat neck to the top of the rad, then bottom of the rad to the large inlet on the water pump housing

Second is through the hole in the turbo rotor housing, through the LIM, into the metal tube bolted to the LIM to the turbo, and then out the other side of the turbo back to a smaller nipple coming off the back of the water pump inlet in the first loop

Third is to the heater core, which is a nipple on the rear iron on the drivers side (a-spec), pointing outward, to a nipple coming off of the firewall. This then goes thru the heater core in the cabin, and out thru a nipple on the passengers side, which is connected to a metal tube running down the pass frame rail and back to the bottom of the radiator

Fourth comes out of the back of the water pump under the alternator, goes to the TB, thermowax, BAC etc (i dont remember the order here), and eventually goes to a nipple on the rear iron that is sticking straight up.

Hope this helps.

 

Topless, thanks bro. Got it and Know what I gotta do. I know I put on the orings o nthe housings, cause I pulled the LIM off cause I forgot when I put the engine together.

The rest, I just gotta get for now.

 

So I can cap off the nipple from the back of the water pump to the TB since I eliminated the BAC ect ect >?

 

yea, you can cap that or run a line directly from there to the nipple sticking straight up off the rear iron, since you'd need to cap that one as well. Either method works

 

Cool. Thanks again Topless.