My guess: bubbling coolant in the block. The pump is now off when the engine stops, so the fluid is sitting in a multiple-hundred (300-400) degree oven.
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-CDepp-
2011 MB Base+S M6 | Invidia Exhaust | TommyKairaHebiBeibi | H&R Spacers 15/20 | GTR Start | 305hp/240tq
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