Turbo Coking - wasRe: <VV> Curious Question - idling

[FrankCB@aol.com]

In a message dated 10/21/04 12:28:17 AM Eastern Daylight Time, 
dkdewald@pasty.net writes:
<<SNIP>>
> The only vehicle I idle for any period of time to allow for cooling is my 
> Dodge truck with its Cummins diesel engine.  I try to let the exhaust 
> temperature gauge (turbocharger) cool below 350F before shutting down so as 
> to not cook the oil in the turbocharger bearings.  Usually this ends up 
> being less than a minute.
> 
 Dale,
       That's exactly what's recommended in the Turbocharging Chapter in the 
Corvair Basics Manual - letting the turbo Corvair engine idle for a few 
minutes after a hot run so the oil flow continues through the bearing until the 
turbo cools down.  Otherwise you stand a good chance of "coking" the static oil 
remaining in the bearing after a premature hot shutdown.
       Frank Burkhard