ucbfc

the coolant nipple on top of my rear iron is blocked off by what appears to be an epoxy/metal of some sort. How would I go about getting it off?

unW7WZ

sounds like throttle body mod. How long have you had the car? Is it a t2? I am guessing it is. the previous owner removed the thermowax valve and secondary throttle plates, im betting.

adrock3217

Why would you want to? It's most likely JB Weld...

I wouldn't want to risk it falling into the engine when trying to get it out.

You don't need to run coolant from there to the coolant filler neck like stock. It has an independent passage internally, or at least thats what a couple of rotary engine builders have found.

Leave it blocked off..one less thing to worry about..

adrock3217

Meh, I don't really consider that part of the TB mod. The coolant line running "on" the TB isn't actually going into it..its just attached.

unW7WZ

meh? when you remove the thermowax, the water has to go somewhere, else block it off.

edit: when i removed mine there were passages through the tb, with a hose in the back. on a N/A there are no passages. But a t2 it runs *somewhat* through it, in which when I removed mine I found white waxy crud. My thermowax was toast.
Edit #2: the return hose runs through the BAC as well. and from there to the backside of the filler neck. i ran mine from the rear iron to the filler neck location

ucbfc

This is actually a replacement iron for a rebuild for a stock s4 t2. Is it ok to just leave it blocked off like that? I thought you needed to block off a nipple on the water pump and remove the thermowax from the tb (or something along those lines).

unW7WZ

thats about the jist. So the iron is from a t2, and you stuck it on an N/a? Just curious, as I have an N/A and a ton of parts, and I have been wondering about the N/a irons. What I heard and know to be true, is that there is a nipple on the SIDE of the rear iron which flows coolant to the turbo. If I use the N/A irons then I have to drill a hole and make my own cooling lines (afaik. dont hold this as truth.)


edit: reread your post.... Ok yea leave it blocked, but also go to www.teamfc3s.org and make sure you have a completely modded tb. if the secondary throttle plates are still in, (they could possibly be wired open but still,) you have to do a slew of things to the tb.

ucbfc

I need to pass cali emissions so not so sure about doing the tb mod right now (Im guessing it messes with some of the smog stuff). If at all possible I would like to reopen this nipple, just need a way to do so.

The motor isnt assembled yet so if I am going to reopen it I thought it would be best to do it now.

RETed

Actually, if you really stared at it, it does go into the throttle body.

I would rather have it blocked.
It's one less thing to worry about.
If you unblocked it, you'd need to run another line to it.
If you put it back to like stock, you'd really have fun trying to remove the UIM next time.
It's better to just leave it alone, unless you live in an area where it's extremely cold and your throttle body has problems with sticking plates?


-Ted

adrock3217

Damn you Ted! Now I have to go find an FC with an un-modded TB...and stare at it...

But yeah, I like the idea of my coolant having 1 less hose to run thru. Think of it like...its doing one less useless thing, and can be used to cool other things more efficiently. :-D

Thats what I always try to tell myself anyways >.>;

RETed

The coolant does run through the throttle body...at least for a turbo FC one it does.
The coolant runs from the BAC to a fitting on the top of the throttle body facing toward the passenger side.
The coolant then goes into the throttle body itself.
It comes out from the back-side where the thermowax is.
It passes around the thermowax to a fitting and then exits into the stupid 90-degree hose that goes under into the top of the rear iron.
Simple enough?


-Ted

rx7man13b

my s5 na is carbed and I have the hose connecting it to the back of the thermstat housing can I remove it?