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Old 01-29-2005, 12:05 PM   #1
Sjerzey05sti
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Default Weird noise coming from my engine...

Last night I was driving my car home and kept hearing a weird noise under boost. It is like a howling, shreeking noise. Similar to when you have the window down alittle bit and air rushes through it and makes a noise. It isn't overly loud but loud enough as to where I can still hear it with the windows up. It sounds like its coming from the left side of the motor which is weird because I thought it might be the turbo. Anyone have any ideas??
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Old 01-29-2005, 01:13 PM   #2
BoostdBoxer
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Just reseat the gasket on the Bypass valve and that will fix your problem..if that is the problem.

Cheers
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Old 01-29-2005, 02:21 PM   #3
Sjerzey05sti
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I think you are right on the money there. But I think I need a new one. It looks like it peeled away from the intercooler. But thanks for the help you just saved me alot of time of searching.
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Old 01-29-2005, 11:50 PM   #4
Sjerzey05sti
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I drove my car to work today and it took 6.5 gallons to go 57 miles. Do you think that if the gasket was leaking it would cause that? Or is the possible leaking gasket only one of my problems?
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Old 01-29-2005, 11:54 PM   #5
Uncle Scotty
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...fix the gasket, and go from there....
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Old 01-30-2005, 12:06 AM   #6
powerslide23
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Quote:
Originally Posted by Sjerzey05sti
I drove my car to work today and it took 6.5 gallons to go 57 miles. Do you think that if the gasket was leaking it would cause that? Or is the possible leaking gasket only one of my problems?
Already on a '05 STi? I wpuld think this is a warranty issue unless you abused it.
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Old 01-30-2005, 12:18 AM   #7
Sjerzey05sti
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I'd rather just do it myself then waste a whole day at the dealer. Plus Miller Subaru sucks alot.
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Old 01-30-2005, 12:31 AM   #8
blinguskahn
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Quote:
Originally Posted by Sjerzey05sti
I drove my car to work today and it took 6.5 gallons to go 57 miles. Do you think that if the gasket was leaking it would cause that? Or is the possible leaking gasket only one of my problems?
Wow, that is worse than my mileage with the Green (11.7mpg)! But seriously, having a boost leak can cause you to run very rich.
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Old 01-30-2005, 12:35 AM   #9
Sjerzey05sti
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I seem to still be making 1.2bar but that stock gauge isn't very accurate. But good to hear that its normal. Its way to cold out to be tearing things apart.
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Old 01-30-2005, 12:38 PM   #10
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....so did you put a 'BOV' on it at some point???
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Old 01-30-2005, 06:30 PM   #11
Sjerzey05sti
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Yes, but its a BPV and I replaced the gasket on it.
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Old 01-30-2005, 06:52 PM   #12
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Quote:
Originally Posted by Sjerzey05sti
I'd rather just do it myself then waste a whole day at the dealer. Plus Miller Subaru sucks alot.
Join www.subarusti.org and share that info in the dealer rating setup they have.
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Old 01-30-2005, 07:23 PM   #13
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Quote:
Originally Posted by Sjerzey05sti
Yes, but its a BPV and I replaced the gasket on it.

Ya got a leak there, somewhere....fix it asap.
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Old 02-03-2005, 07:15 PM   #14
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Alright I put a new gasket on and put the stock "BPV" back on and its still making that howling noise. I didn't think it was just the gasket since I wasn't leaking any boost. But that gasket was shot. So any other ideas guys?? I checked everything and can't seem to find anything.
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Old 02-04-2005, 04:38 AM   #15
ranmaru
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i have the same prob but it is only at about 4k rpm and under very light boost. If i press the gas a little harder it stops. very confusing It is like a droning sound. Only when i shift gears and press the gas hard enough to just start to boost.
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Old 02-05-2005, 01:20 AM   #16
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Check the silicone hose between the intercooler and throttle body. They make CRAZY noises when the hose clamp has slipped.

Quite often they will leak at exactly the same boost pressure, it's pretty funny sometimes.
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Old 02-05-2005, 05:15 PM   #17
Sjerzey05sti
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The hose is pushed all the way against the IC and looks like its about a 1/2" off the TB where the stopper part that holds the hose from going over the front of the TB(if that makes sense). So as soon as I get home from work ill have to try moving. Thanks for all the helps guys.
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Old 02-05-2005, 09:35 PM   #18
kool168
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Quote:
Originally Posted by Sjerzey05sti
The hose is pushed all the way against the IC and looks like its about a 1/2" off the TB where the stopper part that holds the hose from going over the front of the TB(if that makes sense). So as soon as I get home from work ill have to try moving. Thanks for all the helps guys.
i am just wondering... why that hose will always lose? i tried to put it back twice already... and today when i was filling gas, so i check the enigne oil too. then i found the hose which connects TB and IC lose again..
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Old 02-06-2005, 01:41 AM   #19
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It's REALLY annoying isn't it. I blew 20+ mins on more than one tune session. Now I check that before I even start tuning.

Samco makes a longer hose, I believe the sexy pink one from SPT is longer too.

Generally we loosen all the IC bolts, pull it forward and tighten them back down.

Siegel
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