Quote:
Originally Posted by 300sdToronto
I had the "siren problem" on my 617 turbo and the issue turned out to be a poorly seated gasket where the turbo air intake tube mates with the air cleaner housing. A simple pull it off, reseat the gasket and reinstall cured my suspected "failed turbo" problem. One of the gaskets is hard to align properly (see the Dieselgiant write up) and using some kind of jelly lube to help it seat is a good idea.
Indie was all over me to buy a new turbo.......
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This sort of goes along with the above.
When the Turbo was rebuilt It may be they did not index the Aluminum Compressor Housing exactly. Meaning that the part the hooks up to the Intake manifold may be a degree or two off. That might keep the Tube between the Turbo and the Intake Manifold from sealing well.
If that is what the problem is not a big deal to line it back up; just loosen the Compressor Housing Bolts enough to rotate it a little to line it up.
A leak there should show up if you use the Soapy Water on the area.