turbo squeal/whine Question? - Saab 9000 Bulletin Board - Saabnet.com
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turbo squeal/whine Question?
Posted by jj (more from jj) on Sat, 6 Dec 2003 09:48:13
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As some of you know, 1 of my 9K's is an
Auto-Aero with an Abbott ECU. The motor has
about 134K. The abbott ECU has been in since
45K.
During the last month or so I have noticed an increase
in the turbo's noise when under boost. Previously, you
could hear a slight whistle through the open air-box K&N
when producing 16-18 psi.
Now, there is a pronounced metalic whine whenever the
turbo pressure is greater than 5 psi. It almost sounds like
a turbine blade is just "nicking' the housing.
I have removed the air-intake duct. The turbine spins
freely with no apparent interference. There does not
appear to be any play in the shaft bearings. I cleaned the
intake side of the turbine with carb-cleaner. Still makes the
same noise.
I also substituted a different BOV.
There is no oil usage. The turbo will still produce 18 psi.
Anybody have any ideas? Should I be looking for a new turbo?
thanks,
jj
'95 Aero
'95 CS lpt-->FPT
posted by 151.203.7...
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