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Is 'cool down' required for the turbos?

posted by  someone claiming to be Punxsutawney Phil on  Tue May 27 06:40 CST 2003 [RELATED]

If you're coming back from a few hot laps on track day, sure!

Otherwise, probably not. This practice stems from the early days of turbos (the Saab 99 Turbo, Volvo 240GLT and Porsche 930 era) when turbos were just oil cooled, not water cooled. It there was no cool down period the oil would "coke" onto the turbo bearing, causing the turbocharger to fail. Turbochargers have mostly been water cooled for almost 20 years now.

I've NEVER bothered to do this, but I do use synthetic oil, and do drive slowly - around the speed limit - down the street to my house for a few minutes before shutting down.

-Punxsutawney Phil






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