
Originally Posted by
buzuki
The main reason for your 'cool down' procedure or people using turbo timers is the fact that your turbo is lubed by engine oil pressure, your turbo spins up to 70,000 RPM. If you switch straight off your turbo could spin for up to 1minute with no oil which can cause premature failure.
Which is why we run the cooldown procedure.
Not exactly how I know turbos to work (or fail)
The "cooldown procedure", or the reason people run turbo timers is to keep the engine running after you have been flogging it.
If you stop the engine the oil stops circulating around the engine and the turbo.
The problem is that the oil cannot be the right grade for the engine and the turbo to stop it from coking.
If you stop the engine dead, the oil will coke and bind to parts in the turbo (bearing etc), and after not a lot of time will cause it to seize.
Simple remedy is to not flog it for the last 10 minutes of your journey.
Generally people don't flog it through the streets near there houses anyway, so it's not usually a problem.
And if you track your car, leave it idle or drive it round slowly to cool it down. (do a cool down lap)
In Corey_R's post, he suggests that the Golf's (R at least) continue to pump oil to the turbo.
This is a great backup, but you shouldn't need to put your car in that position that it really needs to cool down after you have stopped.
MY11.5 Golf 118TSI DSG - United Grey, Sports pack (cloth), Bluetooth, MDI
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