Perhaps the biggest and most common mistake was omitted.
5) Cool down: The turbo and manifold MUST be cooled down prior to

shutdown.

 Failure to do so will roast the oil that is stagnant in the bearings
leading to deposits and premature bearing failure.

Jeff Spitzer

Bill Freeman wrote:

A bit of clarification.   This is done by idling the engine for about 5

minutes

prior to shutdown.  This is a necessary proceedure for any turbo'd

engine, esp

when coming directly off of a heavy load condition, like high-speed

cruising

in a car and pulling into a rest area.  An immediate shutdown is very

bad.

John Slade wrote:

Interesting. I drive Saab 9000 Turbos. I did 100,000 miles in the first one
and have 150,000+ on my second one. I drive them HARD and never once did I
do any cool down procedure. Seems kinda dumb to drive fast car, then have to
sit in it for 5 minutes after you arrive. I always switch off immediately
after stopping. I've never needed engine maintenance of any kind.

Do Saab do something different with their turbos?
Anyone know the weight of a Saab 9000T engine? It has LOTS of power at the
low end.... just a thought...
John Slade
Cozy MKIV #757 http://kgarden.com/cozy
Almost ready for the engine.

Check and see if the turbo has a water cooled bearing housing.
Don't need the power on the low end. Where do you live John?
West Texas I hope. Now that would be driving HARD.
I found I could sustain the top speed of a car in West Texas
for up to twenty minutes before braking for the next town.

Paul Lamar
 
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