Scott Speirer wrote:

Thought I'd bounce my latest findings of the newsletter group concerning my
turbocharger.

I had bought a '91 13B Turbo engine, which included the stock turbocharger.  The
turbine was seized.  I dissassembled the turbocharger.  There were white-colored
powder deposits all over the inside walls of the compressor housing.  The compressor
wheel was caked with these deposits.  After cleaning some of this stuff with my
fingers, my skin was quite irritated.  No deposits were found in the turbine wheel or
housing.  After cleaning off the stuff, the turbine assembly spun freely.

I suspect the deposits were engine coolant residue.  There is a receeded (sp?) disc
area in the compressor housing which is made for the base of the compressor wheel to
fit into when installed.  The clearance is fairly tight when the compressor wheel is
installed.  There were deposits in this receeded area, and I suspect the water seal
around the turbine shaft failed and released coolant into the compressor housing.

So, how well do you think engine coolant burns?  I think the water component wouldn't
hurt, and as Leon has made light of, water injection is a great way to raise the
detonation threshold for the charge mixture.  But, I wonder how the
antifreeze/antiboil chemicals behave in the combustion chamber?  I think I'll be
taking apart my engine for a systematic inspection and cleaning.

Scott

 
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