Turbo water return to thermostat housing?

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240sxfan6882
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Turbo water return to thermostat housing?

Post by 240sxfan6882 » Thu Dec 13, 2012 8:37 am

I have a n00bish question that I need answering, and I know you guys are the best to ask this.

I want to make my water return line to the thermostat housing by welding a -6an fitting to it. However, I'm worried if I will have any water-backing up issues before the thermostat opens? Once it opens it will have awesome suction to drain the coolant out of the turbo, but if it's closed can it actually backup and boil inside the turbo?


Any feedback will be appreciated like always! Thanks a ton fellas!

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Post by z240xs » Fri Dec 14, 2012 6:44 am

boosting it! solving it!

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Post by 240sxfan6882 » Fri Dec 14, 2012 7:59 am

z240xs wrote:viewtopic.php?t=29253&highlight=t28+install

that should help ya
I've seen that post before and I didn't really want to run the lines that way because there's not a whole lot of water pressure there for the turbo...although it should work "ok" since a ton are doing it that way.

Thanks for the link.

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Post by Freise » Fri Dec 14, 2012 11:50 am

There's more than enough pressure/flow through the tb loop, I found that out when I didn't have the fittings tight enough lol
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Post by shift_down » Fri Dec 14, 2012 1:53 pm

YEP, and you don't really even need high pressure to.cool the turbo. Those lines are just a precaution, some people dont even run them. So if you are running lines from anywhere, you will be safe
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Post by 240sxfan6882 » Fri Dec 14, 2012 4:55 pm

Yeah I guess your right. I feeding from the block via the 1/4BSP fitting on there. Ill just drain to the returning-heater hose... that should work.

Thanks fellas!

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Post by schmauster920 » Fri Dec 14, 2012 5:20 pm

If you use the heater lines it will reduce flow through the heater core, therefore the heat coming out of the heater. It depends on line size. Another downside is that the heater would have less of a cooling effect on the motor which is never good.

The lower radiator hose may be better as a return? Ive never owned a water cooled turbo
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Post by 240sxfan6882 » Fri Dec 14, 2012 5:43 pm

schmauster920 wrote:If you use the heater lines it will reduce flow through the heater core, therefore the heat coming out of the heater. It depends on line size. Another downside is that the heater would have less of a cooling effect on the motor which is never good.

The lower radiator hose may be better as a return? Ive never owned a water cooled turbo
Yeah the lower radiator hose IS a better return, and that's why I want to weld a return fitting just ontop of the thermostat housing, which is attach to the bottom return hose! Now you see what I meant. Thing is... with the thermostat closed... will it back up the flow?

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Post by schmauster920 » Fri Dec 14, 2012 7:18 pm

I cant help you with that one.. Im sure some of the more knowledgeable members will chime in, we have had quite a few of these threads recently
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