Help Very Loud Induction Noise

[jazza08]

Hey peeps

I was driving my car tonight, it was quiet cool so I was giving it some now and then, after a long drive on the freeway I stopped and then pulled away, i noticed a very loud sucking/induction noise coming out of the engine bay and a loss of power (but not boost level via boost gauge)... my only thoughts are that it may be loose intercooler piping or something along those lines? It was like a woooooshhhhh as the turbo built a decent amout of pressure

Just a note i just had a dump/front/cat fitted about 3 days ago if that might have anything to do with it...

I will have to go and check things out in day-time wen i have some light outside

Any help would be appreciated!

Thanks all

Jazza

[Craved]

leaking BOV perhaps..

either way it would be strange to have something leaking, and still get the same boost level..

also leaks in the pressure side of the engine make them run really crap with AFM based cars.

[jazza08]

I did think of bov... but its hooked up after the stock bov so i doubt that would be the case! Ive had intercooler pipes blow off on my last car, i am only guessing this is held on by the factory clips but not quiet on properly so when too much pressure is built up it leaks?

Btw craved ur cars hot lol

[Craved]

haha thanks

yeah after my upgrades had alot of issues with cooler piping.

when they come off all together the car stalls out due to the AFM reading a high airflow, so dumps heaps of fuel in...

this is why i mention running bad with a leaky pipe, would be putting more fule in as the turbo is sucking more air in as some is leaking and normal amount is going into the engine (boost reading)

map sensor'd cars dont have this issue since they run off the manifold pressure..

is it happening all the time now? or was it a once off?

[jazza08]

I cant say as i drove it for say 2 minutes after i noticed it...

As i said it seems to run fairly normal until it hits some decent boost (10ish psi) and then this howling noise comes outta no where lol

Im pretty sure for that reason something is leaking, the car still makes the same boost levels (just takes more abit rpm) as the leak isn't huge but obviously noticeable...

[Craved]

ahhh.. sounds more familiar now

would more than likely be your exhaust gaskets ..

check turbo to manifold and turbo to exhaust gaskets..

pretty sure this will be the cause

[jazza08]

I will take it back to them this arvo and get them to look at it!

[teejay]

yeah sounds like turbo gasket , or maybe exhaust wasnt sealed right when put in

or your screaming like a girl cos your not used to the power

[jazza08]

Tj comes outta his home hehe!

Blown turbo

Anyone who has a hi-flowed 20/25 turbo or even standard 25 turbo in good nick please pm me!

No further replys needed, thanks all

[Craved]

wouldn't mind some details on the turbo blowing ..

was it blowing smoke?

cause it wouldn't be the rear wheel as your getting boost..

[Stevie]

yeah it sounds like an exhaust gasket to me (i have done one before)

I would be careful handing over any dosh for a blown turbo before getting an indpendent second opinion.

Edited March 23, 2006 by Stevie

[jazza08]

One of the bearings in the turbo has shat itself, the turbo was inspected for this and thats how they found it! The place i go to is a noted workshop and I have used them for years, plus im not buying the turbo off them anyway lol

Bearing pushs against the compresser cover when coming onto too much boost which causes the horrible noise i hear! Its fine to drive off-boost for awhile until i get a new one but as you mentioned its not to do with the compresser/exhaust wheels on the turbo.