Turbo coolant feed on rotor housing
 

This is a s4 TII engine. Is using one 20B housing and one s4 TII housing. When the engine was assembled, the rotor housing with the coolant passage on rotor housing, through manifold to turbo was put in front, the 20B housing does not have a coolant feed on the housing (its blocked/sealed). This isn't a big deal is it? I can just draw coolant from somewhere else? Wheres a good spot? Do I have to tap and run a bolt through that front rotor housing coolant passage now? I am going to be running the stock s4 turbo for awhile. The front rotor housing is actually the front rotor housing, hehe, its stamped with a F, and the 20B housing (in rear) is (i guess i got lucky when bought it) is stamped with a R for rear. Any help appreciated.


-Marc

http://www.nopistons.com/forums/inde...howtopic=42337

theres a pic, i would upload it here, but like always, the site is slow as fuck.

You think this site is weak, go to teamfc3s...that thing has been slow like whoa this week.

Who's bright idea was it to assemble that engine that way? All that needed to be done, was the housings switched. The t2 housing in rear, where the coolant passage is needed, and the 20b housing in front. I often use NA housings or FD housings in the front position of turbo engines...even if the housings are meant to be in the other position (for instance, putting an R housing in front) it still runs the same, this just affects port air passages, which you can modify while the engine is apart to work properly anyway.

As it is, I'd either just go with a non-wet turbo, run the stocker without water and turbo time it instead, or I'd pull the turbo water line from the back of the block, the nipple that used to go to the thermowax (you're not running that, are you?). I'd probably go with SS line though, as the line will see a lot of heat.

Thanks Kevin. Do I need to do anything with the front TII housing? Since it will just be flowing coolant to the solid part of the intake manifold? No I'm not running the thermowax.

-Marc

Just make sure to use the rubber o-ring when you bolt it all in place. Since you'll really need a place to run the return, just feed it into the nipple under the intake manifolds and you should be set.

is that thermo connection right at the top of the engine? that little hose that goes to the intake?

that MF ticks me off every time I pull the top apart but I have no bright ideas on how to block it.

So rubber o-ring in the open hole on the rotor housings...then flowing coolant to the flat spot on the manifold (no hole side) will not promote any leaks or give me any trouble? the 20B housing is already plugged, so I'll go see right now about getting a o-ring in both. thanks.

-marc

No no. YOu dont understand. ON a stock t2 block, both rotorhousings have a coolant passage. ON a stock t2 LIM, the one from the rear feeds water through the LIM to the turbo; the one on the front dead ends at the manifold...both get an o-ring for sealing purposes. There won't be any coolant flow out the back rotorhousing obviously, so there is no need (nor a place) for an o-ring. The front will require an oring.

thanks you kevin! I'm here to learn..

-Marc

I got my bac block off plate from k2rd.com and the plate doesnt fit the whole bac passage. Anybody has this same problem?

-Marc