[AT] Turbochargers

[Dennis Johnson]

Cecil,

My Buick Gran National eats about 2 turbos for every change in spark plugs. They can run for some time with bad bearings, but when the oil seal goes you know it from the smoke.
You might be able to take piping loose from turbo and try to feel how much play the shaft has. You could also see of the blades have any signs of wear where they hit the housing.
A boost gauge might be useful in determining the turbo performance if you could find specs on what the boost should be at various running conditions.
One thing that will help turbo life is an post running oil lube system of some sort. I have a kit still on the shelf that will pre-lube and post lube the turbo after you loose oil pressure, and before you build oil pressure. A simpler system would be a small accumulator and a check valve that would just provide a little more lubrication as the turbo shuts down. Turbo's spinning after the crank stops causes significant turbo bearing wear.

Dennis


Sent from my iPad

> On Nov 10, 2015, at 6:15 PM, Cecil R Bearden <crbearden at copper.net> wrote:
> 
> Does anyone have experience with turbochargers with bad bearings?
> My TS110 ( The money Pit ) has a chirping/squeak at mid throttle after 
> starting and until it has run for 10 minutes or more.  I have replaced 
> all belt idlers and pulleys up front thinking that was the problem.  
> When it was hauled to the stealership, the exhaust pipe was not taped 
> shut.  When I later  removed the head, I found that the #4 exhaust valve 
> head was laying in the cylinder.  And I hate to admit it, but when I 
> hauled it home, I did not tape the exhaust shut either.  I was very 
> frustrated trying to load it in the 100 deg heat and humidity with a 
> bunch of idiots for help.  After I removed the head at home, I found the 
> valve damage.  Now that I hear the squeak, I also seem to have a lack of 
> power, and also more smoke than I noticed before.  It also has an air 
> leak in the fuel lines.  It is one of the most idiotic designs I have 
> seen for a fuel pump system. The system is under suction from 1 ft 
> behind the injection pump all the way back to the fuel tank..  The quick 
> connector at the sediment bowl up front needs an odd sized O-Ring.  New 
> Holland does not list it.  I tried to match it up, but it still leaks.
> 
> Cecil in OKla
> 
> 
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