proxlamus© Posted November 8, 2007 Share Posted November 8, 2007 alot of ya guys know.. im not mechanically inclined or stupid.. but this has baffled me. I did a quick run of boost down the street and all of a sudden ive been hearing a loud loud sound similar to a goose call screaming from my engine. I checked the belts.. and the vacuum lines.. at idle its screaming.. when I rev the RPM's the sound increases and sounds like a balloon deflating (squeeling).. goes from loud to slowly "running out of air" the steady scream. I had a similar problem when I ran the valve cover breather and PCV to the intake after I did all my mods and turbo swap... only on DECEL.. i was thinking maybe it was the valve cover gasket. i just run them open now any idea's guys?! Quote Link to comment Share on other sites More sharing options...
BobbyZ Posted November 9, 2007 Share Posted November 9, 2007 For lack of a more educated guess I am going to have to say you have a goose in your engine. Quote Link to comment Share on other sites More sharing options...
Mayolives Posted November 9, 2007 Share Posted November 9, 2007 Bov? Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted November 9, 2007 Author Share Posted November 9, 2007 you know I was thinking the blow off valve.. but I doubt it would be stuck open.. hmmm. ill check it out in a few min and try to put my ear up to it. and its such a weird noise.. no bov would make that this is also vacuum dependant. an increase in Vacuum increases the noise. Idle is 12 in . hg. cruise or decel is like 20in. hg. Decel is the loudest Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted November 9, 2007 Author Share Posted November 9, 2007 i just went for another run. the sound stopped. WTF. i removed the charge piping and everything. and then back on. Weird.. something is going on Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted November 9, 2007 Share Posted November 9, 2007 brake booster? Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted November 14, 2007 Author Share Posted November 14, 2007 I've narrowed down where the noise is coming from.. Somewhere in the area of Cylinder 1, the thermostat and the distributer. Now the noise is a squeeling noise(letting air out of a balloon with a pinched valve) and is related to only vacuum. The greater the vacuum, the louder and higher pitched the noise is. Also.. this will only make the noise when HOT. the engine will not do this cold or warm.. only fully warmed up or hot. Could this be a thermostat?? Quote Link to comment Share on other sites More sharing options...
Challenger Posted November 14, 2007 Share Posted November 14, 2007 Finding any condensation around the area? Quote Link to comment Share on other sites More sharing options...
olie05 Posted November 14, 2007 Share Posted November 14, 2007 maybe your intake manifold gasket blew out, could be the injector seal. I doubt the manifold cracked though. If it's happening under vacuum it has to be coming from somewhere between the TB and the intake ports. I'm curious to see what it turns out to be. I don't want any geese in my engine bay. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted November 14, 2007 Author Share Posted November 14, 2007 There is no condensation =( I do have a bad gasket.. damn exhaust bolts loosen over time and started leaking.. I need to replace it. Maybe thats the problem.. but this noise.. oh man oh man. it hurts its so loud. What i cant seem to conclude is if its the gasket.. what does it have to do with relation to heat?! Quote Link to comment Share on other sites More sharing options...
GrommitZ Posted November 14, 2007 Share Posted November 14, 2007 Maybe you can use a heater hose, with one end against your ear, to narrow down the source of the noise. You can allow try spraying starting fluid near suspect areas. If the idle increase, you know you have a vacuum leak nearby. Quote Link to comment Share on other sites More sharing options...
Hey_Allen Posted November 14, 2007 Share Posted November 14, 2007 Could the heat relation be something expanding as it warms up, causing a leak? With the comment about the squealing and under vacuum, I am thinking of vacuum being drawn across a gasket somewhere. As a kid, I was shown how to make an obnoxious squeal with a folded piece of grass or paper that you could blow across. Could this be happening in your intake system somewhere? Quote Link to comment Share on other sites More sharing options...
TONY C Posted November 14, 2007 Share Posted November 14, 2007 is the car running any different than usual? a bad alternator bearing can make all kinds of noises and can fool you from where the noise is coming from. take a long screwdriver, rest the handle against your ear and the blade end on the alt or anything you want th check. you will hear the prob if there is 1 Quote Link to comment Share on other sites More sharing options...
olie05 Posted November 14, 2007 Share Posted November 14, 2007 What i cant seem to conclude is if its the gasket.. what does it have to do with relation to heat?! two different metals, say aluminum vs. cast iron expand at different rates. So, there may not be a big enough gap between the exhaust and the head, until your engine heats up and then there is enough gap to make a noise. but that doesn't necessarily mean that your noise is coming from there, or is caused by that. Quote Link to comment Share on other sites More sharing options...
240swapped Posted November 14, 2007 Share Posted November 14, 2007 have you tried a spray test? just get brake cleaner and spray it in the area you think the sound is coming from and wait for the idle to change, then you'll know if it's a vacuum/intake leak. just a thought........ Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted November 14, 2007 Share Posted November 14, 2007 The first sign of my head gasket leak was a squealing sound when I reved the motor in neutral. Lemme go find the video..... http://forums.hybridz.org/showthread.php?t=124110&highlight=squeal Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted November 14, 2007 Author Share Posted November 14, 2007 Well I have a metal headgasket.. Im wondering if the head is beginning to warp... oh how I wonder how I wonder. Keep in mind this only squeels after about 15 min of driving. soooo I'll do a compression test.. and intake/exhuast manifold Quote Link to comment Share on other sites More sharing options...
gretchen/jason Posted November 23, 2007 Share Posted November 23, 2007 Funny i helped a guy build a first gen turbo eclipse had the same sound like a honking goose when under boost , ended up he put the check valve to the brake booster in backwards he was reading 12 lbs of boost fliped it around he hit 20 lbs of boost blew the booster out though , cant say you have the same issue though . Jason Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted December 2, 2007 Author Share Posted December 2, 2007 i changed my gaskets yesterday.. i need it to warm up to operating temp to test her... ill see if this fixes it. the old intake/exhaust gasket was BAD BAD BAD. probably the #1 reason Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted December 5, 2007 Author Share Posted December 5, 2007 Problem solved.. bad intake/exhaust gasket... The aluminum intake and cast iron exhaust manifold heated differently.. some of my bolts were loose.. once the car hit operating temp.. the gasket vibrated and whistled or goose coughed LoL Anyway.. all fixed. The car actually ran better with a vacuum leak believe it or not.. or maybe it just sounded loud.. which gave a false sense. Thanks guys!! Quote Link to comment Share on other sites More sharing options...
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