Re: [DML] Re: Turbocharger availability

["Joseph Kuchan" <josephkuchan@xxxxxxxxxxx>]

His cautions should be observed, but the stated possible effects of ignoring 
the recommendations are, shall we say, "amusing".

You want the car to warm up before getting into boost to be sure there is an 
adequate flow of oil for the turbo bearings which spin very fast.

As far as the cool down issue goes, the bearings get quite hot due to their 
high speed, the fact that the shaft is driven by hot exhaust gasses, and the 
fact that heat is actually created during operation on both the turbine and 
compressor sides of the unit. When the car is shut down, oil flow across the 
bearings ceases almost immediately. If you don't let the car cool down by 
idling a few minutes before you turn it off, then the very hot bearings 
which are still spinning very fast, can literally cook the oil to ash. This 
is very bad for the turbo. Hence the recommendation to let the car idle a 
few minutes. That gives the turbo time to slow down, lets the bearings get a 
little cooler, and in the lng run extends the life of the turbo.

I guess ANYTHING is possible, but its hard to imagine the car "blowing up" 
if you don't do this!

-Joe Kuchan


>From: lordshill@xxxxxxx
>Reply-To: dmcnews@xxxxxxxxxxxxxxx
>To: dmcnews@xxxxxxxxxxxxxxx
>Subject: Re: [DML] Re: Turbocharger availability
>Date: Mon, 5 Dec 2005 10:13:50 EST
>
>
>Hello..  I have a BAE Turbo that was installed by the prior owner back  on
>May 1, 1984.  When I purchased the car from the original owner he was  very
>specific about letting it warm up properly and "cool" down properly.   When 
>I
>asked him why I was informed that it may "blow up" if it is not  done.  
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