Normal to hear Internal Wastegate?

reddevil · 08-08-2008, 10:13 AM

So I turned the boost up towards 18psi this morning and went for a quick jaunt near some school zones to see if everything was kosher and check for more smoke and oil leaks.

Previously, @ 12-13 psi, no noise when the set boost was hit.

But now?

Seriously, it sounds ALOT like an EWG! I let off the pedal at first cause I thought something broke. But then I did it a few more times and bingo, evertime I hit targeted boost, the internal wastegate was LOUD.

gt30 turbo.

* Registered users of the site do not see these ads.

dmross · 08-08-2008, 11:17 AM

Quote:

Originally Posted by reddevil

So I turned the boost up towards 18psi this morning and went for a quick jaunt near some school zones to see if everything was kosher and check for more smoke and oil leaks.

Sure you don't have an exhaust leak?

reddevil · 08-08-2008, 11:45 AM

Pretty sure, as it only happens once targeted boost happens. But I havent looked under the hood since I got back to the shop.

flycaster · 08-08-2008, 12:57 PM

Internal WG...GT30? What turbo is this? Just curious, since this also impacts your other thread about smoking on throttle lift.

reddevil · 08-08-2008, 02:24 PM

While it may not be a true gt30, when I purchased it I measure the both wheels inner and outer spec and compared them to the garrett side and thats what it match 100%. It has a "Precision" exhaust housing.

flycaster · 08-08-2008, 05:58 PM

[edit] You just answered my question in the other thread - it's a journal bearing CHRA. Knowing that, disregard my comments on the oiling problems since they don't apply.

reddevil · 08-09-2008, 03:08 AM

Might be a boost leak, I only hear it in 3rd....

Testing testing testing.

norbs · 08-09-2008, 05:48 AM

Yeah, when I had my motor rebuilt I set the boost to 10PSI during run in. After a weekend of driving, it developed a noise just as you describe. On boost, loud wastegate noise. I new this because I adjusted the boost to a higher threshold and the noise come on later i.e more boost, and was more faint. Now that motor is run in, boost is set to 16psi and no more noise. Haven't bothered investigating as am waiting on a new turbo anyways. Perhaps running it at 10PSI overworked the wg??

reddevil · 08-10-2008, 03:37 AM

I ran it tonight @ the track and "compensated" for the boost drop by turning up the boost......

Then last run it didnt leak and boost jumped to 30+ psi and and an intercooler hose blew off.

So I called it a night.

I am pressure test sections of it and have found quite a few pinhole leaks, nothing major. But I did find one LARGE leak which I thought I fixed before I went out. A section of straight pipe connecting to another section is leaking. Weird. Fix it tommorrow.

08-08-2008, 10:13 AM	#1
reddevil Scooby Guru Member#: 64673 Join Date: Jun 2004 Chapter/Region: NWIC Location: portland Vehicle: 1990 Legacy wagon goes 12.387 @ 116.5	Normal to hear Internal Wastegate? So I turned the boost up towards 18psi this morning and went for a quick jaunt near some school zones to see if everything was kosher and check for more smoke and oil leaks. Previously, @ 12-13 psi, no noise when the set boost was hit. But now? Seriously, it sounds ALOT like an EWG! I let off the pedal at first cause I thought something broke. But then I did it a few more times and bingo, evertime I hit targeted boost, the internal wastegate was LOUD. gt30 turbo. * Registered users of the site do not see these ads.

08-08-2008, 05:58 PM	#6
flycaster Scooby Specialist Member#: 60142 Join Date: Apr 2004 Location: Bend, OR Vehicle: 2011 WRX Grey	[edit] You just answered my question in the other thread - it's a journal bearing CHRA. Knowing that, disregard my comments on the oiling problems since they don't apply. Last edited by flycaster; 08-08-2008 at 06:13 PM.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Is it normal to hear the sound like water dropping inside car?	mizh	Water/Methanol Injection, Nitrous & Intercooler Cooling	10	10-20-2006 12:49 PM
Is it normal to hear noises when "engine braking"	SinisterMinister	Transmission (AT/MT) & Driveline	6	08-28-2005 01:32 PM
Normal to Hear?	Alxaguiar	Factory 2.0L Turbo Powertrain	1	07-23-2002 03:09 AM
Is it normal to hear the brakes engage under normal braking conditions?	Robmat	Brakes, Steering & Suspension	0	09-13-2001 01:01 PM
Is it normal to hear the brakes engage when....	Robmat	Brakes, Steering & Suspension	2	07-08-2001 10:41 AM

08-08-2008, 11:45 AM	#3
reddevil Scooby Guru Member#: 64673 Join Date: Jun 2004 Chapter/Region: NWIC Location: portland Vehicle: 1990 Legacy wagon goes 12.387 @ 116.5	Pretty sure, as it only happens once targeted boost happens. But I havent looked under the hood since I got back to the shop.

08-08-2008, 12:57 PM	#4
flycaster Scooby Specialist Member#: 60142 Join Date: Apr 2004 Location: Bend, OR Vehicle: 2011 WRX Grey	Internal WG...GT30? What turbo is this? Just curious, since this also impacts your other thread about smoking on throttle lift.

08-08-2008, 02:24 PM	#5
reddevil Scooby Guru Member#: 64673 Join Date: Jun 2004 Chapter/Region: NWIC Location: portland Vehicle: 1990 Legacy wagon goes 12.387 @ 116.5	While it may not be a true gt30, when I purchased it I measure the both wheels inner and outer spec and compared them to the garrett side and thats what it match 100%. It has a "Precision" exhaust housing.

08-09-2008, 03:08 AM	#7
reddevil Scooby Guru Member#: 64673 Join Date: Jun 2004 Chapter/Region: NWIC Location: portland Vehicle: 1990 Legacy wagon goes 12.387 @ 116.5	Might be a boost leak, I only hear it in 3rd.... Testing testing testing.

08-09-2008, 05:48 AM	#8
norbs Scooby Newbie Member#: 135787 Join Date: Dec 2006	Yeah, when I had my motor rebuilt I set the boost to 10PSI during run in. After a weekend of driving, it developed a noise just as you describe. On boost, loud wastegate noise. I new this because I adjusted the boost to a higher threshold and the noise come on later i.e more boost, and was more faint. Now that motor is run in, boost is set to 16psi and no more noise. Haven't bothered investigating as am waiting on a new turbo anyways. Perhaps running it at 10PSI overworked the wg??

08-10-2008, 03:37 AM	#9
reddevil Scooby Guru Member#: 64673 Join Date: Jun 2004 Chapter/Region: NWIC Location: portland Vehicle: 1990 Legacy wagon goes 12.387 @ 116.5	I ran it tonight @ the track and "compensated" for the boost drop by turning up the boost...... Then last run it didnt leak and boost jumped to 30+ psi and and an intercooler hose blew off. So I called it a night. I am pressure test sections of it and have found quite a few pinhole leaks, nothing major. But I did find one LARGE leak which I thought I fixed before I went out. A section of straight pipe connecting to another section is leaking. Weird. Fix it tommorrow.