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Idle is very important- but the main reason is to supply the turbocharger with oil. Because the charger is a supplemental external device and the last unit which receives oil.
Don't idle longer than necessary- EGR opens during partial load(including idle) and soot builds up quickly in the intake. I had to scrape out 3-5mm of soot after 100k.
But anything longer than a minute during cold conditions is waste of Diesel.
The shut down prodedure is even more important. You would be amazed to see engine temperatures climbing after shut down!
Water temperature may be ok-but oil temperature will be at a safe operating temperature after the double distance- if you drive without load!
Last edited by Deezelweazel; 01-06-2010 at 06:31 AM.
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