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Location:
Canberra
Registered:
August 2003
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Intake Noise
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Wed, 15 December 2004 23:14
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I have a problem with a whistle type sounds as I hit boost, sounds like an intake sound. Enginge is the 3sgte in the grpA.
My house mate agrees with the description of the sound...but we cant narrow it down much further (no boost in nuetral makes it hard to stick your head under and listen)
There was a build up of carbon around the outake of the turbo (that short little pipe that links turbo to intercooler). We cleaned that off and I have driven 100km since and there has been no additional build up since. The noise however may have been happening for a while as I cant hear it with the windows up, and proir to my 6 week holiday it wasn't windows down weather.
Any idea how else we can diagnose this leak (if it is in fact a leak)
Help would be much appreciated!
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Intake Noise
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Thu, 16 December 2004 00:11
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Check:
-Piece of pipe from the turbo to the intercooler for cracks.
-Rubber flange from throttle body to intercooler for cracks.
-Gaskets. head to exhaust manifold, exh. manifold to turbo, turbo to downpipe. Check all these are in good condition.
Quite often if the gasket has blown out you can see a little bit of carbon where the gasket has blown out.
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Thu, 16 December 2004 01:13
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| Toobs wrote on Thu, 16 December 2004 11:11 |
Check:
-Piece of pipe from the turbo to the intercooler for cracks.
-Rubber flange from throttle body to intercooler for cracks.
-Gaskets. head to exhaust manifold, exh. manifold to turbo, turbo to downpipe. Check all these are in good condition.
Quite often if the gasket has blown out you can see a little bit of carbon where the gasket has blown out.
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There was a carbon buildup on the turbo from the turbo-intercooler pipe. After cleaning how long untill I would expect it to take for this to re-appear?
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Intake Noise
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Thu, 16 December 2004 03:03
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Depends what it is from... I wouldn't have thought you would see enough carbon to cause concern on the intake side of the turbo.
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Thu, 16 December 2004 03:09
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There was enough carbon there to cause concern, about 3 50c peices worth - reasonably dark, but it hasn't re-appeared. yet.
Im guessing that because it is on the intake side, the leak may have been there for a while, and I only just noticed...
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Location:
Melbourne
Registered:
May 2002
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Re: Intake Noise
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Thu, 16 December 2004 08:12
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Ive heard this whistle that you describe on another car. Didnt disapear till the pipe work was all rearranged just becuase of located things that dwell within it. After that was done it went away. So that suggests to me that it was some sort of leak so as Toobs said check it all out, even if you just replace it with something temp just to see if something that looks suspect is actaully the problem.
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Thu, 16 December 2004 22:28
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Who has the EPC, can someone tell me what part no that pipe is??
I will get on the phone to my housemate (handy he works for toyota) and get him to grab me one, will replace it tomorrow!
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Thu, 16 December 2004 22:30
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I don't think it is intake gaskets, because I cant see anthing obvious, and surely if it was I would be able to hear a noise when it is in vacuum?
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Intake Noise
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Fri, 17 December 2004 10:02
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Just because you had some carbon in your intake doesn't mean this noise is coming from there.
If a gasket blows it will usually be on the exhaust side of the turbo... most likely the gasket between the turbo and exh manifold.
A severe gasket blow will make your car sound and drive like a whipper snipper
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Mon, 20 December 2004 05:43
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I gave up...time for someone with a clue to look at it. Very early indications are a crack/hole in the intercooler.
This doesn't make a heap of sense to me as the fluid isn't dropping at all. But it does bubble when you open it and the engine is running (obiovusly i only do this when the engine is cold.  )
Well I should know more by tomorrow lunchtime, this should dent the treasury!
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Intake Noise
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Mon, 20 December 2004 06:33
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To make a hole in the cooler there would have to be some foreign debris made its way through (or from) the turbo... if that was the case your turbo is probably f'cked.
Seems unlikely to me... but then so does the carbon deposit.
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Mon, 20 December 2004 21:12
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I assume he meant an internal crack - which at a guess would mean that the turbo is venting through intercooler cap, which is consistant with the noise always appearing at the same level of boost.
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Location:
Sydney
Registered:
May 2002
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Re: Intake Noise
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Tue, 21 December 2004 11:55
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Dude, I think you may be confusing the radiator and the intercooler. One is full of coolant, one is full on compressed air.
Checking the radiator is not likely to help you find a hole in the intercooler.
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Tue, 21 December 2004 22:38
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Dude, I think you are confusing a Air to Air Inter cooler and a Air to Water Inter cooler. With the Air to water, which the grpA has, what I said makes sense!
I'm no mechanic, but I do know what goes on under the bonnet 
But it wasn't, it was a cracked intake pipe, All fixed. I don't feel bad I couldn't find it, it took my mechanic 3 hours and had to remove the inter cooler, more than I was willing to do!
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Intake Noise
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Wed, 22 December 2004 03:09
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| Squid wrote on Wed, 22 December 2004 09:38 |
Dude, I think you are confusing a Air to Air Inter cooler and a Air to Water Inter cooler. With the Air to water, which the grpA has, what I said makes sense!
I'm no mechanic, but I do know what goes on under the bonnet
But it wasn't, it was a cracked intake pipe, All fixed. I don't feel bad I couldn't find it, it took my mechanic 3 hours and had to remove the inter cooler, more than I was willing to do!
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Cracked intake pipe ay... which one?
Reminds me... gotta fix that damned PCV hose thats split on mine... stupid toyota discontinuing parts!
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Location:
Canberra
Registered:
August 2003
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Re: Intake Noise
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Wed, 22 December 2004 03:16
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The one between the turbo and the intercooler - short 2 inch thingy. The slpit was tiny, near invisible to the naked eye, but under boost it would open up.
Also a vacuum hose for the power steering was contributing to the noise...
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