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High Pitched Squeal On High Rpm / Boost

Everlong-S13

By Everlong-S13,
in Engines & Forced Induction

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Everlong-S13 Community Regular

Everlong-S13

Posted
Posted

Hi guys, I know this has been discussed in a few thread before, I'd just like some help identifying something.

Occassionally I get a high pitched squeal or whine from somewhere under the bonnet, hardly happens, I found downshifting into third or second and giving the car a bit of juice in high rev (3500 - 4000 rpm) and full boost makes the noise last for a second or so.

It's quite hard to replicate. Anyway from a few threads I have read people are recommending checking the turbo exhaust manifold etc for loose bolts and such.

I've taken off the turbo heat shield and not sure what to check. Most of the bolts were pretty tight already, I did notice that there was a bolt missing on the manifold and I'm not sure if there was an existing bolt there or not? Anyway I half screwed in a bolt in there to see, took the car for a spin, couldn't get the car to re-create the noise however I didn't notice a small chirp in second gear that may have been it starting.

Anyway, see the pic below. Is there anything in the pic I need to check, and should there be a bolt in the spot I marked?

turbobd.jpg

ARTZ Grand Master

ARTZ

Posted
Posted

that bolt is nothing...it just holds the heat shield on

when mine started squealing it was the bolts that hold the turbo to the manifold (the one you can see in your picture actually as well as another one)...I tightened it with my hand and it was good again for a bit...

just feel around the turbo and manifold bolts to see if any are loose...

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

Had a mates car do that and it was a tiny split in a cooler hose (was the elbow under the turbo from

Memory) it would only do it under full boost and the split was really hard to find.... Long shot but I you don't find the other issues then it's worth a look :)

  • 3 weeks later...
gaidzin Newbie

gaidzin

Posted
Posted

Mine did this a while back, ended up being a intake gasket..

sorry, was that the gasket between intake manifold and the engine head or the gasket between the parts of the manifold itself? pardon my English, I'm from Russia))

Room42 Proficient

Room42

Posted
Posted

Squealing is from tight or loose belts African Americanachi. Have a good feel of your visible belts. Maybe lay of the maccas. It could be your wife complaining. Mine does. Its a high pitched squeal the whole way there until her fat cake hole get filled. Nah kidding, she is a beautiful 5"10' 26 yro bitch! Or loosen your cam belt. But dont do that cos you dont know what the f**k you are doing.

WARLORD Veteran

WARLORD

Posted
Posted

same problem for a while things ive checked on inlet side cos that's where its coming from.the noise starts at about 7psi

manifold gasket.

disconnected factory boost gauge sender.

checked intercooler joiners for pin holes.

checked hoses for splits as this has happen be for to me.

even had a smoke test twice.

the only thing left for me is the pvc valve and hoses to the pvc

its a split hose some where i think cos it needs some psi be for forced open and whistle

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Squealing is from tight or loose belts African Americanachi. Have a good feel of your visible belts. Maybe lay of the maccas. It could be your wife complaining. Mine does. Its a high pitched squeal the whole way there until her fat cake hole get filled. Nah kidding, she is a beautiful 5"10' 26 yro bitch! Or loosen your cam belt. But dont do that cos you dont know what the f**k you are doing.

epic post +1 Like

newboost Rising Star

newboost

Posted
Posted (edited)

I had pretty much the same problem as you have. I had checked all the gaskets and still could not find the leak. It was also happening at 7psi and above. I had replaced all my vac hoses & all new clamps. Finnally I made this up and found the leak in about 5 mins.

Remove your intake from the front of the turbo, Attach the hose with valve to the front of the turbo, pump up using compressor. (no more than 10 psi) You should be able to hear the leak.

(Engine off, It will not hold pressure long. Just enough to find the leak)

Parts used to make this are

1 right angled silicone pipe from old stock intercooler pipes (or from any auto store)

1 screw in tyre valve

2 hose clamps

1 plastic pvc end cap (bought from a plumbimg store)

post-31128-0-39939900-1349689660_thumb.jpg

Edited by newboost
  • 6 months later...

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