I wonder if the previous owners let the engine idle down before shutting it off.
I always did that with my old 3.5 ecoboost and never had an issue.
You mention failed bearings.
They say you’re supposed to let the turbo cool down but I’ve always seen it as bad to shut the engine off when the turbos could be spinning at higher RPMs, how’s the oil supply to them after you shut it down if they’re still spinning fast ?
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Two 1975 455 Grandvilles &
'79 455 Trans Am
‘69 Camaro SS 396/375 (owned since ‘88)
‘67 Corvette 427/435
‘23 Lexus LS500 awd
‘20 Audi R8 & ‘25 Toyota RAV4 (wife’s cars)
‘95 Ford F250 4wd 7.3 p-stroke
& countless Jeeps & off road vehicles & motorcycles 
Last edited by 455Grandville; 07-10-2021 at 11:28 PM.
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