Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Omegatoy]

sounds liike a boost leak to me!!! did you use new inlet gaskets? cos boost escaping from inlet sounds like the high pitched squeql you have described!!
dont ask me how i know!!

[Turk]

When stationary and revving, the sound starts at around 4000rpm.
When driving it starts at just below 2000rpm, "WHEEEEE" [size=8](Ahh, shut up !)[/size] and, er...no, I didn't use new gaskets[size=8]. (Well the originals looked alright to me )
[/size]
I did use the manifold from my spare engine as I had cleaned out all the gunge.
Thinking about it, it did sound different, like it wasn't quite tight, when I was giving it a few firm thumps to make sure it was seating right before final tightening of the nuts.  Maybe the manifold has slightly deformed to fit it's original engine. It has done 225k miles.
Think I'll clean out the original manifold and re-fit that tomorrow.
64 and 82 have cleared but 96 (EGR) is back  :-?

[Seth]

sounds liike a boost leak to me!!! did you use new inlet gaskets? cos boost escaping from inlet sounds like the high pitched squeql you have described!!
dont ask me how i know!!

That's right 'OT' - it's on the 'blow', rather than the 'suck' side.

Saying that, have you checked/looked into the turbo inlet yet?

[Turk]

Just taken it for a run and I'm quietly optimistic (but extremely hopefull) that it may be down to using the inlet manifold off my other engine. The "wheee" sound seems to hit a peak and stay there, yet the speed & rpm continue to increase.
 
Oh...and now code 64 is back again, along with 96. Yeah, Whatever !!

Chartz, have you examined your turbo spindle and inlet yet ?

[chartz]

Seems fine. Maybe a micro-leak somewhere along the exhaust. I'm stuck here.

[Seth]

The one in the video sounds ok to me, certainly sounds healthier than mine 
My whistling sound is much more noticable than that. It's loud enough to draw peoples attention if I accellerate.
More of a wheezey whistle that starts from just under 2,000rpm and gets louder as the revs increase but the pitch doesn't change or match in with the revs, it just hits a peak and gets louder with a volume ratio that outweighs the exhaust and engine sound combined.
The whistling sound wouldn't be out of place on a runway just before takeoff. 

If it is the turbo, does the whole unit have to be changed or is it just the silver coloured "snail shell" shaped unit that I recognise as a turbo, and is removal from my spares car possible from above only ?
 

Are you sure that you haven't disturbed anything on or around the induction system whilst changing that No4 injector?

If the turbo's giving up on you, it must be changed as a complete unit, as in the Ebay photo. We're talking precision engineering here! It's pretty well impossible to access satisfactorily from above only.

My whistle from about 2000rpm is better described as a "Wheeeee" that intensifies and gets louder as the revs increase.  It doesn't rise and fall with the engine speed like the one in the video. It stops as soon I decelerating or hold at a neutral throttle position.

All I removed yesterday was the inlet manifold and related pipes etc to change the injector.
As soon as I started it up and raised the revs there was the "Wheeee".
It was fine when I drove over to do the job :-? 
Can't think what it could be on the inlet side of things.  What's the torque setting for No. 4 Injector ?
   

Torque setting:
Injector to cylinder-head is 65Nm.

[Turk]

Found the cause of my "Wheee" sound.
http://i696.photobucket.com/albums/vv327/Turkpix/DSC00835.jpg
So, er...yes, this may have caused a teeny weeny boost leak. Omegatoy does it again
Cleaned out original manifold, re-fitted and all is hunkydory at Turksville Tractor Centre.
Well, apart from all codes now clear...except 64...but that's for another thread.
Sethsmate, thanks for the torque setting  
Chartz, any joy with tracing the leak ?

[Omegatoy]

Aw shucks

fresh break tho, didnt you hear it snap? or crack? never mind its sorted now!!

[Turk]

Didn't hear anything at all. Must have done the job 10-15 times over the 8 odd years I've had Migs and the only thing different this time was that it didn't sound seated properly as I lightly thumped it down to check it was seating properly before tightening it up.
Anyhoo, all sorted my side.
Not sure how Chartz is getting on, so don't go far !   

[p j morgan]

well done turk another good job done

[Turk]

well done turk another good job done

As long as someone points me in the right direction,  I'm usually ok 

[chartz]

Hi,

Well this morning no more whistling...
The car works as it should, with only the usual—and normal—discrete bit of whistling noise from the turbo.
If something is indeed broken à la Turk, it fixed itself up! Anyway, Turk's noise must have been very different from mine.
Conclusion: help!

[Turk]

I had more of a wheezing "Wheee" sound and didn't rise and fall with the engine speed. Bleedin' loud tho

If it's gone, thank the fairies, and give it an oil and filter change, unless it's been done very recently. Having said that, it would do no harm to give it a change even if it was done recently, a couple of short sharp oil changes will only flush out any baddies lurking around. 
4.5k miles absolute maximum between changes to keep 'em sweet.     

[chartz]

Hello to all,

Problem solved!
The culprit was the exhaust manifold gasket (the one with the heat shield) which was cracked. Cost: £50.

See http://www.realoem.com/bmw/showparts.do?model=HA01&mospid=47379&btnr=11_1201&hg=11&fg=50&lang=en part n°2

Thanks for your support!

[Seth]

Hello to all,

Problem solved!
The culprit was the exhaust manifold gasket (the one with the heat shield) which was cracked. Cost: £50.

See http://www.realoem.com/bmw/showparts.do?model=HA01&mospid=47379&btnr=11_1201&hg=11&fg=50&lang=en part n°2

Thanks for your support!

No probs buddy!