Thread: Coolant flow through TB?

Here is what i posted on the other forum:

So I have been doing some thinking and reading on this topic lately and here is what I came up with.. Many people, as well as I did, hook up their coolant lines from the turbo to the Throttle Body, this may be the easiest way to run coolant lines but is it the most efficient? The coolant that is going through the throttle body has already gone through the hot engine and is on the way back to the radiator. This means, that we are trying to cool the turbo with hot water from the motor, this heats up the water even more, thus raising the temperature of the engine more.. This becomes a cycle.. This has led me to believe that the TB may not be the best place to splice into when running the coolant lines to the turbo. The real question is, when Nissan designed the DET engine, the coolant lines to the turbo tap right into the block. Is that water that the turbo receives right from the radiator OR has it also already gone through the engine block? We all know that with the turbo our engines run much hotter than N/A so finding the best water source for the turbo may be more important than we all think!

The thermostat opens a return path from the radiator. Coolant flows through the radiator from top left to bottom right and then past the thermostat. The water where the TB and EGR get their sources is either the coolest (if the thermostat is open) or not very hot to begin with (if the thermostat is closed).

where does the coolant flow through the EGR system? I have remove one before and didn't see any coolant?

The lowport intake manifold has an inlet and outlet for coolant right by where the EGR block-off plate goes. Not sure about other manifolds.

can you see it in this pic? Sorry hope I'm not bringing this too far off topic.

Which pic?

I found a pic from my build thread.



You can clearly see them to the left and to the right of the EGR port on the lowport intake manifold. I have since removed the water lines and the steel provisions. For reference a little bit of the lower part of the opening to the throttle body can be seen at the top of the picture as can the coolant line going into the throttle body in the top-left corner of the picture. You can also see the coolant hose that leaves the throttle body from the right and snakes down to the right EGR water port.

Here's another pic that shows a good view.

thanks! my pic was linked from g20.net so I guess unless you are member there you can't see it. I see the coolant for the EGR now. I knew where the TB ones were.

I don't know what happened... I looked at the code of your post and manually put the picture address into the navigation bar and it took me to the picture. And now it's showing up in your post. I bet G20.net doesn't allow their pics to be embedded or something.

In you diagram it's very hard to point out as I'm sure you can see now that you know where it is.