Loud like horn sound when getting close to full boost?

[talontsiboy24]

I just installed exhaust manifold gasket and turbo gasket. after that i went to drive the car and at when i boost past 10psi my car makes this noise kinda sounds like a horn like pressue escaping somewhere? i am missing one exhaust manifold stud and another stud is loose also missing 2 turbo bolts can it be that is whats causing this noise cause the exhaust manifold isnt sealing properly? or is this a boost leak?

 

[Bluefire16]

A small boost leak will do this. Its kinda funny, if the coupler is tightened down a certain way, and enough air can get through the coupler acts like a wedge and its air squeeking or making a horn noise.

Do a BLT and you will find your problem. It can get reallllly loud, this has happened 1 or 2 times to me.

 

[talontsiboy24]

A small boost leak will do this. Its kinda funny, if the coupler is tightened down a certain way, and enough air can get through the coupler acts like a wedge and its air squeeking or making a horn noise.

Do a BLT and you will find your problem. It can get reallllly loud, this has happened 1 or 2 times to me.

Yea i will get back to you guys im doing a boost leak test this weak.

 

[beihl304]

While u have the intake off for the boost leak, check shaft play too. If the compressor wheel is hitting the housing it can cause a horn like noise. Besides doesn't hurt to check shaft play when intakes off

 

[talontsiboy24]

While u have the intake off for the boost leak, check shaft play too. If the compressor wheel is hitting the housing it can cause a horn like noise. Besides doesn't hurt to check shaft play when intakes off

Yes intake off for bl test and im gonna check it all out.

 

[Bluefire16]

Dont be hard on the shaft when looking for play. Most people actually CREATE their shaft play by FORCING and WIGGLYING it to hard. One finger, give a little and i mean "little" push in a direction. Never force it.

A boost leak will be your problem, im almost 95% positive. A bad turbo will make a louder spool or whinning noise. You are probally hearing a VvvvHHHHH sound.

 

[talontsiboy24]

So i did a bl test today and it was a boost leak thank god! It was the intercooler pipe slipping off the coupler so i pushed it back in really good and tighten the hell out of it and no more boost leaks so im happy and that horn noise is gone!

 

[Bluefire16]

^^ hate to say i told ya so

your welcome

 

[talontsiboy24]

^^ hate to say i told ya so

your welcome

Sucks though cause the pipe that sticks out the intercooler on the drivers side has a dent in it is there a way i can get it back to being round? cause i put a new coupler and tightened it up and its still leaking because of that dent.