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turbo cooldown - engine off

posted by  c_j_mooney on  Wed Aug 3 04:05 CST 2005
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last visit: Wed Sep 14 17:39 CST 2011
[RELATED]

What you're doing is probably not necessary, as the others have said, unless you've really been pushing it or cruising on the highway for a while, but it will definitely not hurt anything. I do idle the 240 before shutting down, because it's not a water-cooled turbo. I remember pulling off the highway at night in my 83 242ti after several hours at 70+mph, opening the hood to reconnect a cruise control line that slipped off, and seeing the turbo housing & manifold glowing from the heat. About a minute at idle and it cooled down. I'm not so worried with the 780, but by force of habit I let it idle for at least a few moments after any fast or aggressive drive. The other preventive measure I'd suggest is a switch to synthetic, it is apparently much more resistant to coking.
--
Chris, Dartmouth NS Canada 70 M-B 280SE, 83 245DL, 84 244 turbo, 90 780 turbo, 92 VW Golf, 90 740 Rex/Regina






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