Hello all. I got a used turbo kit a few years ago from a fellow forum member, and am finally getting around to installing it. Hence, I don't remember much of what he told me, I don't have instructions, and I'm kind of struggling along trying to get it installed.

I've searched extensively, and have not sufficiently answered my questions about coolant routing (maybe I'm bad at the internet). I have a journal bearing to4s I think? I thought he said to4z, but threads have pointed out that that is a ball bearing turbo so I don't think that's what I have.

The kit I bought came with hard lines for the coolant. I'm trying to get the routing correct. The lines are such that I can barely fit them. I'm afraid I may have to discard them and start over.

My questions are about coolant flow (not oil):
1. Does it matter which direction coolant flows through the turbo? There are two ports for coolant, one on the driver and one on the passenger side? Is the flow directional in a journal bearing to4s-type turbo?
2. Which bungs on the water pump housing do I source from? Which do I return from? I'm attaching a picture. I've seen pictures online that look like I can use either of the ports I've circled in blue. And I assume the return for the coolant is the bung you can barely see which I've circled in red.
3. I'm attaching a picture of someone else's water pump housing (they modified it or threaded fittings). If someone could be so kind as to circle/label the preferred inlets and outlets I would be greatly obliged.

My car has been disassembled for a few years now so it's quite the challenge to get it back together. I appreciate any assistance.

 

Coolant feed is the lower one you have circled in blue, and return can be either one of those red ones. Looks like the top is the correct position for it. That looks like one of our kits. Post a photo of the compressor wheel, and I will tell you what it is... Looks like a To4E compressor housing. Everything should fit, we test fit everything before shipping.

 

Yeah, I believe it is one of your kits. Bought it from a guy in Arizona.

Do you cut off and plug the nipple I labeled 2? Because the hard line, that I guess I can call the coolant return line, hits that nipple. That's what I meant when I said it didn't fit. If I cut off and plug that nipple I assume it would work. Is that how you would normally install this kit?

 

You are correct. We pull that press in plug, tap and install a 1/4" pipe plug.

I bet that is Brian's old turbo kit. The turbo is a 57 Trim To4E with a 1.15 T4 P trim. The chra is water cooled, with a 360 thrust bearing( journal bearing).

4th & 5th Videos down are what you should expect for results.
http://www.turblown.net/videos.html

 

Yeah, that's correct. I wasn't going to publicly identify you or him, but as long as you have... :-)

Just for my own edification can you tell me if it matters which direction coolant flows through the turbo? Does it have to flow in a specific direction?

 

It doesn't matter, but if the chra is rotated slightly( 10-15 degrees) then you want the cold( feed) on the lower point portion. I can't remember exactly on that kit, been too long.