bubbly noises pressure testing charge pipes - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jamesm · 02-22-2014, 11:16 PM

so today was boost leak eradication day. had 3 boosted 86's in the green monsta's garage all getting tested. all three made this weird bubbly gurgly noise when the system was pressurized... sounded like fluid bubbling. any idea what this might be? tried popping the oil cap and gas cap to see if pressure was getting in the fuel system or crankcase... nothin'. ideas? anyone else pressure tested their system and heard the same thing?

cdrazic93 · 02-23-2014, 04:42 AM

http://miketurboinc.com/pages.php?pageid=16

Dont know if this helps, but good luck with finding your problem!

Deadspool · 02-23-2014, 06:51 AM

I will let you know in a few days.

Ironsquid · 02-23-2014, 10:25 AM

i check coolant also, gotta be fuel.

Sportsguy83 · 02-23-2014, 10:35 AM

I had some gurgling noises after having the car sit for three months. It was coming form the catch can. Was worried I somehow f*cked up the motor.... It went away after a few WOT pulls. I figured it was the PCV valve clogged up.

I have not heard them ever again.

Probably off topic but just a random thought to consider.

Ny Brz · 02-23-2014, 11:10 AM

Was this when the cars were on or when the engines were shut off, had something similar on my wrx when I turn the car off. I flushed the radiator and changed the thermostat and the noise went away.

mrk1 · 02-23-2014, 11:22 AM

Where do you have the caps when your pressure testing? I always put mine at the turbo inlet and then at the pipe the hooks up to the TB. So when I pressurize it's only the turbo/pipes/and intercooler. I don't see how any of that would reflect in the motor? Is that how you did yours?

cdrazic93 · 02-25-2014, 01:44 AM

@jamesm did you find out what the bubbling was from?

jamesm · 02-25-2014, 02:16 AM

Quote:

Originally Posted by mrk1

Where do you have the caps when your pressure testing? I always put mine at the turbo inlet and then at the pipe the hooks up to the TB. So when I pressurize it's only the turbo/pipes/and intercooler. I don't see how any of that would reflect in the motor? Is that how you did yours?

Yes that is how we were testing, at the turbo inlet. I still haven't thought of anything that could be the cause. I don't think it's a problem as much as just some weirdness lol. All 3 cars made the same noise, and none had abnormal leakdown.

I'm definitely interested to find out what it is though, for science.

Edit: just re-read your post and no we didn't block off the pipe at the throttle body, just hooked up to the turbo inlet and expected some leakdown through the valves. We didn't rotate the engine to tdc first either.

Deadspool · 02-25-2014, 07:33 AM

I wont be able to test mine until the weekend. I will have an update by then though.

mad_sb · 02-25-2014, 09:13 AM

Quote:

Originally Posted by mrk1

Where do you have the caps when your pressure testing? I always put mine at the turbo inlet and then at the pipe the hooks up to the TB. So when I pressurize it's only the turbo/pipes/and intercooler. I don't see how any of that would reflect in the motor? Is that how you did yours?

This, otherwise your pressurizing the head, the block, the pcv system, etc the gurgling sound is probably air bubling through oil.

Ironsquid · 02-25-2014, 12:14 PM

Quote:

Originally Posted by mad_sb

This, otherwise your pressurizing the head, the block, the pcv system, etc the gurgling sound is probably air bubling through oil.

In fact we are not pressurizing the oil there is no pressure at either side of te head. Also Im not running pcv in my setup neither are the other two cars.

You can in fact leave the TB elbow on and pressurize the entire intake system including the manifold which is where most leaks occur. You take that elbow off and cap it you wont know about any leaks after the TB. TB seals can leak, vacuum lines attached to the mani can leak.

The only thing capping the at the TB solves is ic piping and bov leaks. Which i would find hard to believe

mrk1 · 02-25-2014, 12:27 PM

I do my tests in 2 steps. IC/turbo/bov and then the manifold. Problem is you cant close all the valves but usually if you just keep the pressure going its enough to find any issues.

jamesm · 02-25-2014, 01:15 PM

Quote:

Originally Posted by mrk1

I do my tests in 2 steps. IC/turbo/bov and then the manifold. Problem is you cant close all the valves but usually if you just keep the pressure going its enough to find any issues.

that's pretty much what we were doing.. just expecting some leakdown through the valves. it's easy enough to tell the difference between normal leakdown and a blown-off hose on the manifold (which seems to be the common culprit with these damn things).

and like @Ironsquid mentioned none of us have intact pcv recirculation. all dual VTA catch cans, as the turbo car gods intended

.

02-22-2014, 11:16 PM	#1
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,293 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	bubbly noises pressure testing charge pipes so today was boost leak eradication day. had 3 boosted 86's in the green monsta's garage all getting tested. all three made this weird bubbly gurgly noise when the system was pressurized... sounded like fluid bubbling. any idea what this might be? tried popping the oil cap and gas cap to see if pressure was getting in the fuel system or crankcase... nothin'. ideas? anyone else pressure tested their system and heard the same thing?

02-23-2014, 04:42 AM	#2
cdrazic93 Junior Join Date: Aug 2013 Drives: a car Location: Probably at school Posts: 4,341 Thanks: 3,184 Thanked 2,512 Times in 1,502 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	http://miketurboinc.com/pages.php?pageid=16 Dont know if this helps, but good luck with finding your problem! __________________ "Ah! What music! They could have never imagined, those pioneers who invented the automobile, that it would posses us like this, our imaginations, our dreams. Men love women, but even more than that, men love CARS!"-Lord Hesketh

02-23-2014, 06:51 AM	#3
Deadspool Much title. Wow. Join Date: Mar 2013 Drives: 2013 BRZ Sport-Tech Location: Edmonton, AB Posts: 716 Thanks: 118 Thanked 292 Times in 163 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	I will let you know in a few days. __________________ ༼ つ ◕_◕ ༽つI PUT A SPELL ON YOU ༼ つ ◕_◕ ༽つ

02-23-2014, 10:25 AM	#4
Ironsquid King of Kiwi Palace Join Date: Aug 2012 Drives: Faster than you Location: Everywhere Posts: 585 Thanks: 184 Thanked 578 Times in 264 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	i check coolant also, gotta be fuel. __________________

02-23-2014, 11:10 AM	#6
Ny Brz Hella Flush Join Date: Aug 2012 Drives: 2013 SWP BRZ Location: Yonkers, NY Posts: 1,090 Thanks: 170 Thanked 332 Times in 251 Posts Mentioned: 20 Post(s) Tagged: 1 Thread(s)	Was this when the cars were on or when the engines were shut off, had something similar on my wrx when I turn the car off. I flushed the radiator and changed the thermostat and the noise went away. __________________ Ny BRZ's Build

02-23-2014, 11:22 AM	#7
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s) Tagged: 2 Thread(s)	Where do you have the caps when your pressure testing? I always put mine at the turbo inlet and then at the pipe the hooks up to the TB. So when I pressurize it's only the turbo/pipes/and intercooler. I don't see how any of that would reflect in the motor? Is that how you did yours? __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

02-25-2014, 01:44 AM	#8
cdrazic93 Junior Join Date: Aug 2013 Drives: a car Location: Probably at school Posts: 4,341 Thanks: 3,184 Thanked 2,512 Times in 1,502 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	@jamesm did you find out what the bubbling was from? __________________ "Ah! What music! They could have never imagined, those pioneers who invented the automobile, that it would posses us like this, our imaginations, our dreams. Men love women, but even more than that, men love CARS!"-Lord Hesketh

02-25-2014, 07:33 AM	#10
Deadspool Much title. Wow. Join Date: Mar 2013 Drives: 2013 BRZ Sport-Tech Location: Edmonton, AB Posts: 716 Thanks: 118 Thanked 292 Times in 163 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	I wont be able to test mine until the weekend. I will have an update by then though. __________________ ༼ つ ◕_◕ ༽つI PUT A SPELL ON YOU ༼ つ ◕_◕ ༽つ

02-25-2014, 12:27 PM	#13
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s) Tagged: 2 Thread(s)	I do my tests in 2 steps. IC/turbo/bov and then the manifold. Problem is you cant close all the valves but usually if you just keep the pressure going its enough to find any issues. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

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