Cooling Turbo

[Guest dcashion]

From what I understand about turbochargers, a turbo keeps spinning for quite a while after you shut the engine down. The reason it's advisable to idle the engine for about a minute is to reduce the speed at which the turbo is spinning to as slow as possible, before shutting the engine down. Shutting the engine down removes the oil supply to the turbo (sourced from the engines oil pump), so the turbo is spinning without a fresh oil supply, causing a risk of siezure. At idle after about a minute, the exhaust gasses propelling the turbo are at an absolute minimum therefore turbo revolutions are minimum also. The greater the speed at which the turbo is still spinning after engine shutdown the greater the risk is for turbo siezure......there is little chance of a turbo siezing, but its more wear & tear on the turbos bushes/bearings.

Pretty spot on!!

DC