squeeling of sorts when gassing the beast

[cuffemark]

my freda is making a faintish high pitch screeching noise when pressing the gas, was kinda hoping it would stop when i changed the atf(with near disasterous results) but god damn it its still there, new turbo went in with the new head 2 months ago and as im very much on a learning curve im basically buggered on this, help!!

[mikeonb4c]

Is it possibly a sheared exhaust manifold stud and/or warped manifold, as they are said to squeal due to escaping exhaust gas when engine is revved? Quite common. Have a search on here for more discussion on it. Good luck - keep us posted

[bigdaddycain]

That does indeed sound like the famed No1 manifold stud. Type in MANIFOLD and STUD into the search bar, make a brew and have trawl through the threads to gen up on tips and methods to best tackle this problem ...

[cuffemark]

is it ok to drive like this??

[missfixit70]

It shouldn't be doing any major damage, but it'll be costing you a bit more in fuel & I reckon you risk distorting the manifold the longer you leave it, but I could be wrong.

[cuffemark]

cheers, i have noticed a bit of an extra thirst from the beast lately, how do i get the best view of the manifold? i was going to start by removing the insulator?????

mark

[missfixit70]

This may help - http://www.lushprojects.com/bongopartsm ... mgno=.html

[cuffemark]

have removed the insulator and had a look round the manifold cant find any busted nuts or sheared bolts this squeeling only occurs when the beast is in a gear and moving no fetid screeching when revving in neutral or park???????????

[mister munkey]

If it is manifold/stud there will be black smoke residue around the area gasses are escaping.
If theres no sign of that maybe you should be looking at a slipping belt . . .
My money's on the manifold though from the sound of it.

[John the sparky]

just had stud 1 go on me.... no soot was visible,

but as you look at the exhaust manifold, at the back of the alternator, the common stud to go is the one that you can see without removing the heat shield

but that was a squeal above about 4000 rpm, so only noticed when pulling away sharply or on kickdown



John

[cuffemark]

the manifold itself is clear, the turbo is cover in a very thin black shiny substance could this be the source of the fetid squeel?

[missfixit70]

If the squeeling comes in at around 2000 to 2200 revs, could it just be the turbo doing what it should? I can hear mine kick in, it may just be your seat clips need bending in a bit to tighten it down a bit to quieten the noise in the cab?
Could be a slipping belt? carefully squirt a small amount of wd40 on the belts, ensuring you don't get any in the alternator, or get some proper belt dressing, if the squeeling stops temporarily, you've nailed it, you can then replace the belts &/or give the pulleys a quick deglaze as necessary.

[cuffemark]

will try all those things you mentioned in morning many thanks kirsty

mark