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Bubbling sound coming from gt35r cooling lines

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Old 05-22-2013, 05:55 PM
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Default Bubbling sound coming from gt35r cooling lines

I was just cruising around in my civic the other day and when I got home I could here a bubbling/boiling sound faintly coming from the turbo's cooler lines.

I'm not sure what's causing this. Air in the system or possibly a flow issue?

Currently one line is connected to the water pipe on the back of the block and the other line runs off the fitting on the top of the head's outlet.

Thanks, Doug
Old 05-22-2013, 08:20 PM
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Default Re: Bubbling sound coming from gt35r cooling lines

My water cooled turbo did that every time I shut it off. Just sounds like heat siphoning to me
Old 05-22-2013, 08:29 PM
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Default Re: Bubbling sound coming from gt35r cooling lines

Its the boiling point of the water within the cartridge as the heat is transferring from turbine housing to cartridge at shut down. Very normal. As long as there are no leaks, no need to worry.
Old 05-23-2013, 02:11 PM
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Default Re: Bubbling sound coming from gt35r cooling lines

great answers, thank you.
Old 05-23-2013, 02:51 PM
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Default Re: Bubbling sound coming from gt35r cooling lines

It may become an issue if it's boiling..may create air in the system. I have my return from my 28rs going to the bottom of my radiator that way when vehicle running it's constantly causing flow from the turbo to reduce the possibility of that happening (o air locks for that matter). Also allows a low point to assist in self bleeding..If there is boiling, it may also reduce the efficiency at which the turbo can dissipate heat as air is one of the best insulators around.
Old 05-23-2013, 06:01 PM
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Default Re: Bubbling sound coming from gt35r cooling lines

How do I know if its boiling or if its self siphonin? I Just changed the coolant this winter and put in a 70% water 30% Peak full strength and a bottle of water wetter.
Old 05-23-2013, 07:54 PM
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Default Re: Bubbling sound coming from gt35r cooling lines

Originally Posted by hoorah
It may become an issue if it's boiling..may create air in the system. I have my return from my 28rs going to the bottom of my radiator that way when vehicle running it's constantly causing flow from the turbo to reduce the possibility of that happening (o air locks for that matter). Also allows a low point to assist in self bleeding..If there is boiling, it may also reduce the efficiency at which the turbo can dissipate heat as air is one of the best insulators around.
Its natural for this, its not going to boil enough to have air bubbles and cause issues with your cooling system, whether its from the bottom of the radiator or through the typical throttle body and water thermostat housing. Gotta stop thinking so much guys. I know its late in the evening but MAN... .

Just run the damn thing..
Old 05-23-2013, 11:49 PM
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Default Re: Bubbling sound coming from gt35r cooling lines

The top line on mine started boiling one day when it got a kink in it. Fixed it and just had the normal siphoning sound.
Old 05-24-2013, 04:32 AM
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Default Re: Bubbling sound coming from gt35r cooling lines

Normal behavior. My water cooled GT28r used to the same thing. Its convection in action
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