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W-1-2-3 Go!
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Sounds like something is rubbing against something, or it's having difficulty breathing. I would check the intake area (with the engine off) and the belts. Are all the belts in good shape - no fraying?
 

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1979 280CE
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Make sure the intake isn't clogged sounds like it is clogged. I found a napkin in my breather one time.

If its not clogged then start removing the belts 1 by one, it could be a bearing about to sieze on one of the accessories.
 

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That's probably it, sounds like there's a hole in the seal. Be careful with that, if that seal lets go the turbo will chomp it down (and damage the impellers). Make sure it's as tight of a fit as you can get it, and make sure it's properly sealed. A royal PITA if you ask me...
 

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1981 300SD
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112 Posts
Discussion Starter · #6 ·
Looked today but nothing is wrong with the aircleaner or seal ring. started the car without the aircleaner unit and made the same noise again. like sheding metals.
de sound comes at the back of the turbo.
 

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1979 280CE
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Put it where the intake and exhaut manifolds meet the motor on the left side.
 

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1979 280CE
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6,120 Posts
That sounds like a leaking valve cover gasket.

A leaking valve cover gasket will not produce that sound though.
 

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1981 300SD
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112 Posts
Discussion Starter · #12 ·
I didn't found the noise that come's out of my engine.
I pulled the belts from the steering and my aircopump but didn't solve it.
when I put my tranny in Drive the sound goes away, but putting in P or Neutral the sound comes again after 5 seconds.
I am confused at this point, anyone?
 

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1979 280CE
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6,120 Posts
Take the belt off and see.
 

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Don't panic! It could be something no so major.
I had some weird noise from my engine 2 years ago
and I was afraid that it could be the timing chain
and would cost me some big expenses.
But lucky enough, It wasn't.
So before you taking anything off,
just get a proper tool and try to exactly locate
the source of that noise first.
I used STETHOSCOPE (paid around under $10) to pinpoint
the source of the noise with good result.
It turned out that my alternator was going bad.
 

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1981 300SD
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112 Posts
Discussion Starter · #18 · (Edited)
took off the belts from the alternator/waterpump but the noise stays.
The only thing I remember that I adjusted the wastegate on my triple-K turbo (?????)

I ordered the stethoscope and want to locate the noise, this is making me crazy...
 

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1981 300SD
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112 Posts
Discussion Starter · #19 ·
A friend of mine (Bruinsma) told me this could be the Transmission (torque converter) because when I put it in Drive the noise is gone for 5 seconds.

I had a leak before in the front main seal of the tranny, put some stuff in the tranny to make the seals softer and stopped the leaking, but now this noise came up after a week.
 
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