Idling to cool turbos is totally and utterly pointless on modern diesels.
First off, turbos on diesels don't run anywhere near hot enough.
Secondly, turbos on modern turbo diesels are cooled by both oil and water.
Thirdly, if the turbo is hot, a small electric pump continues to circulate coolant round the turbo after the engine is off.
Turbo failure is unusual on the Kia/Hyundai engine, just bad luck.
The 1.5CRDI is not the same engine as the 1.6CRDI. ONly similarity is they both run on diesel and are fitted to KIA and Hyundai cars. The 1.5 is a Far Eastern engine, the 1.6 is brand new German engine designed a few years ago to replace the 2.0CRDI which was an Italian VM Motori engine originally fitted to the c'eed and i30.
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