[AT] Turbochargers

[Greg Hass]

I have a limited knowledge of turbos so I will share what I know. First 
of all, I don't think they would squeak as they have there own oil 
supply line with oil being pumped to the bearings at all times. Second, 
the blade tolerance is so close that any bearing wear will make the 
blades rub the housing. At one time I was cutting hay with my cousins IH 
1066 and when I would shut it off I could hear what I thought was the 
blades rubbing as they came to a stop. He was taking it to the dealer 
for some other problem so I told him to have the turbo checked; it came 
back with a new turbo. Also I have never heard of changing bearings, 
your just replace with a new or rebuilt unit. As for the noise, I can't 
say for sure but I have seen belts act like that. My wife's last car 
would do that. When she started it in the morning, especially if it was 
damp out, the belts would squeak like craze for a few minutes. I don't 
remember if the noise stopped when the belts were replaced or not, but I 
think it did or was not as bad. I'm thinking some of the noise was 
caused by the older belts being glazed.
     Greg Hass